[6/6] hbase git commit: HBASE-18147 POC jenkinsfile for nightly checks.

HBASE-18147 POC jenkinsfile for nightly checks. * adds ruby tools to dockerfile * adds rubocop to dockerfile * adds ruby-lint to dockerfile * adds perlcritic to dockerfile Signed-off-by: Alex Leblang Signed-off-by: Josh Elser Project:

[6/6] hbase git commit: HBASE-18147 POC jenkinsfile for nightly checks.

HBASE-18147 POC jenkinsfile for nightly checks. * Jenkinsfile that works for all current branches. * adds dev-support script for setting parameters for our yetus nightly invocation * adds ruby tools to dockerfile * adds rubocop to dockerfile * adds ruby-lint to dockerfile * adds perlcritic to