Scala 2.12 with Spark 2.4.4 and Hadoop 2.8.5

[toxicafunk]

Scala build for Scala 2.12, Spark 2.4.4 and Hadoop 2.8.5. It uses the s2i-scala-container for Scala 2.12 from this PR.

Some weird issue I encountered in assemble scripts were:

1. for conf_file in *; do returned a String with all the file names of a dir, I had to replace it with for conf_file in $(ls); do
2. Similarly, for assemble in $(ls -1 $STI_SCRIPTS_PATH | grep -w "^[0-9]*-*"); do just looped forever so I just hardcoded the call.

[todo]

we can add a shortcut error here by testing

oshinko-s2i/rad-image

Lines 516 to 521 in 44a22e5

	# TODO we can add a shortcut error here by testing
	# for existence of the build input if the value is
	# not a schema
	if [ "$localbuild" == "false" ]; then
	check_oc_login

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This comment was generated by todo based on a TODO comment in 44a22e5 in #298. cc @toxicafunk.

[rimolive]

Hi @toxicafunk. Thank you so much for the contribution! I'm reviewing the PR and soon will be merged.