Add support for Oracle Linux 8

[mfeit-internet2]

Title says it all.

Known needed:

• Restore the %{_pscheduler_python} macro in pscheduler-rpm
• Change all references to python in Requires and BuildRequires to use the macro
• Re-add packages required for OL8 that were stripped out.

[mfeit-internet2]

These were the remaining references to Python in RPM specs resolved in ec82458:

./postgresql-init/unibuild-packaging/rpm/postgresql-init.spec:Requires:	postgresql-plpython3 >= %{_pscheduler_postgresql_version}
	OK; Worry about this if there's ever a Python 4.

./pscheduler-server/pscheduler-server/unibuild-packaging/rpm/pscheduler-server.spec:     "PYTHON=%(command -v python)" \
	FIXED: Python by name

./pscheduler-server/pscheduler-server/unibuild-packaging/rpm/pscheduler-server.spec:%triggerin -- python-pscheduler
	FIXED:  Needs to refer to the package by its full name

./pscheduler-server/pscheduler-server/unibuild-packaging/rpm/pscheduler-server.spec:API_ROOT="$(python -c 'import pscheduler ; print(pscheduler.api_root())')"
	FIXED:  Needs to refer to the package by its full name

./pscheduler-server/pscheduler-server/unibuild-packaging/rpm/pscheduler-server.spec:BuildRequires:	postgresql-plpython3 >= %{_pscheduler_postgresql_version}
	OK; Worry about this if there's ever a Python 4.
 
./python-daemon/unibuild-packaging/rpm/python-daemon.spec:%setup -q -n python-%{short}-%{version}
./python-daemon/unibuild-packaging/rpm/python-daemon.spec:Source:		python-%{short}-%{version}.tar.gz
	Both OK; This is the tarball the source is packaged in.

./python-jsonschema/unibuild-packaging/rpm/python-jsonschema.spec:Provides:	python-%{short} = %{version}-%{release}
./python-jsonschema/unibuild-packaging/rpm/python-jsonschema.spec:Provides:	python-%{short} = %{version}-%{release}
	FIXED:  Redundant; dependent RPMs refer to it by its full (python3-xxx) name.

./python-kafka/unibuild-packaging/rpm/python-kafka.spec:%setup -q -n %{short}-python-%{version}
./python-kafka/unibuild-packaging/rpm/python-kafka.spec:Source:         %{short}-python-%{version}.tar.gz
	Both OK; This is the tarball that the source is packaged in.

./python-nmap3/unibuild-packaging/rpm/python-nmap3.spec:%define actual  python3-nmap
	OK; we fixed this.

./python-pscheduler/pscheduler/unibuild-packaging/rpm/python-pscheduler.spec:OLD_LOGROTATE="%{logrotate_d}/python-pscheduler"
	OK; this is a generic name

./python-pyasn1-modules/unibuild-packaging/rpm/python-pyasn1-modules.spec:Provides:	python-%{short} = %{version}-%{release}
	FIXED:  Redundant; dependent RPMs refer to it by its full (python3-xxx) name.

./python-pyasn1/unibuild-packaging/rpm/python-pyasn1.spec:Provides:	python-%{short} = %{version}-%{release}
	FIXED:  Redundant; dependent RPMs refer to it by its full (python3-xxx) name.

./python-pyjq/unibuild-packaging/rpm/python-pyjq.spec:Patch0:		python-%{short}-%{version}-00-nodownloads.patch
./python-pyjq/unibuild-packaging/rpm/python-pyjq.spec:Patch1:		python-%{short}-%{version}-01-integer.patch
	Both OK; these are the name of the package directory, not the installed module.

./python-pyrsistent/unibuild-packaging/rpm/python-pyrsistent.spec:Provides:	python-%{short} = %{version}-%{release}
	FIX:  Redundant; dependent RPMs refer to it by its full (python3-xxx) name.

This got us to a running build of pScheduler. Steps to repeat on a fresh VM with Git and Docker installed:

git clone "[email protected]:perfsonar/docker-devbox.git"
eval $(./docker-devbox/setup)

ddb build ol8u
ddb boot --login tester ol8u

# (Now logged into Docker container "tester")

dnf -y install git

cd /tmp

for REPO in i2util owamp pscheduler
do
    git clone "[email protected]:perfsonar/${REPO}.git"
    git -C "${REPO}" checkout 5.1.0
done

make -C i2util
make -C owamp

# Still working in the branch.
git -C pscheduler checkout issue-1421
make -C pscheduler

pscheduler troubleshoot

[mfeit-internet2]

These references to [eo]l[89] in RPM specs in 5.0.8 may require attention in 5.1.0:

./python-werkzeug/unibuild-packaging/rpm/python-werkzeug.spec:
%if %{?ol8:0}%{!?ol8:1}
# OL8 doesn't have this, but the build succeeds without it.   <-- Seemed OK on OL8.
# TODO: See of we can live without this on CentOS
BuildRequires:  %{_pscheduler_python}-sphinx
%endif

./python-pyjq/unibuild-packaging/rpm/python-pyjq.spec:
%if 0%{?el8}
BuildRequires:  %{_pscheduler_python}-Cython >= 0.19
%endif
%if 0%{?el7}%{?el9}
BuildRequires:  Cython >= 0.19
%endif

./python-nmap3/unibuild-packaging/rpm/python-nmap3.spec:
%if 0%{?el7}
Requires:       %{_pscheduler_python_epel}-simplejson
%endif
%if 0%{?el8}
Requires:       %{_pscheduler_python}-simplejson  <--- Didn't seem to be an issue without it.
%endif

./python-flask/unibuild-packaging/rpm/python-flask.spec:
%if 0%{?el8}%{?el9}
Requires:       %{_pscheduler_python}-click  <--- Permanent in el9.  No action needed.
Requires:       %{_pscheduler_python}-jinja2
%endif
...
%if 0%{?el8}%{?el9}
# EL8/EL9's auto dependency scanner wants /bin/python3, which nothing provides.
AutoReqProv: no     <--- Permanent in el9.  No action needed.
%endif

./pscheduler-tool-powstream/powstream/unibuild-packaging/rpm/pscheduler-tool-powstream.spec:
%if 0%{?el8}
Requires:       %{_pscheduler_python}-pytz  <--- Part of OL8 and EL9.  No action needed.
%endif


./pscheduler-tool-dhclient/dhclient/unibuild-packaging/rpm/pscheduler-tool-dhclient.spec:
%if 0%{?el8}
Requires:       dhcp-client
# Needed so the sudoers file can be built
BuildRequires:  dhcp-client  <--- Made permanent.  No action needed.
%endif


./pscheduler-server/pscheduler-server/unibuild-packaging/rpm/pscheduler-server.spec
%if 0%{?el8}%{?el9}
Requires:       %{_pscheduler_python}-pytz     <--- Made permanent.  No action needed.
%endif


./pscheduler-core/pscheduler-core/unibuild-packaging/rpm/pscheduler-core.spec:
%if 0%{?el8}
Requires:       gnuplot >= 4.6.2     <--- Made permanent.  No action needed.
%endif
...
%if 0%{?el8}
Requires:       %{_pscheduler_python}-pytz     <--- Made permanent.  No action needed.
%endif


./pscheduler-core/pscheduler-core/unibuild-packaging/rpm/pscheduler-core.spec:%if 0%{?el8}
%if 0%{?el8}
Requires:       gnuplot >= 4.6.2     <--- Made permanent.  No action needed.
%endif
...
%if 0%{?el8}
Requires:       %{_pscheduler_python}-pytz     <--- Made permanent.  No action needed.
%endif


./iperf/unibuild-packaging/rpm/iperf.spec:
%if 0%{?el9}
# The macro isn't present on EL9.   <--- Should be ported into 5.1.0
autoconf
%else
%{__autoconf}
%endif