Cleaned up dependencies (#125)

Clean up build dependencies:
 - Added scikit-image dependency to fix stistools.defringe.mkfringeflat import of astropy.nddata.utils.block_reduce(). - Removed documentation packages from setup.py and moved to doc/environment.yml
 - Updated doc/environment.yml with proper doc build dependencies
 - Moved test dependencies to setup.py tests_require
 - Changed nose dependency to pytest
 - Added commented-out dependencies from testing code that are not called: crds, requests
 - Removed unused nightly test JenkinsfileRT for now
 - Moved conftest.py to tests/ directory to get fixtures to work with pytest properly
 - Retained ipython doc env dependency (but accidentally moved it in the list between commits)

Jenkinsfile

@@ -8,7 +8,7 @@ bc1.name = "release"
 // Would be nice if Jenkins can access /grp/hst/cdbs/xxxx directly.
 bc1.env_vars = ['TEST_BIGDATA=https://bytesalad.stsci.edu/artifactory']
 bc1.conda_channels = ['http://ssb.stsci.edu/astroconda']
-bc1.conda_packages = ['python=3.6', 'pytest', 'crds', 'hstcal', 'scikit-image']
+bc1.conda_packages = ['python=3.6', 'pytest', 'crds', 'hstcal']
 bc1.build_cmds = ["pip install -e .[test,all]"]
 bc1.test_cmds = ["pytest --basetemp=tests_output --junitxml results.xml --bigdata -v"]
 bc1.failedUnstableThresh = 1

doc/environment.yml

@@ -9,10 +9,10 @@ dependencies:
   - scipy>=0.14
   - sphinx=1.8
   - stsci.tools
+  - ipython
   - d2to1
   - stsci.distutils
   - stsci.tools
-  - ipython
   - pip:
     - stsci_rtd_theme
     - sphinx_automodapi

setup.py

@@ -45,14 +45,16 @@
     ],
     install_requires = [
         'astropy',
-        'nose',
         'numpy',
-        'numpydoc',
         'scipy',
-        'sphinx',
-        'sphinx_rtd_theme',
-        'stsci_rtd_theme',
         'stsci.tools',
+        'scikit-image',
+    ],
+    tests_require = [
+        'pytest',
+        'six',
+        #'requests',
+        #'crds',
     ],
     packages = find_packages(),
     package_data = {