Preprocessor

Pull request #16: Feature/hadoop ops

Merge in EOSC-RS/preprocessor from feature/hadoop-ops to develop

* commit 'f9e519c2110c297471e05684737d8ca0ce692181':
  RS-382 changed logging level of UserActionsPublisherImpl#publish from INFO to DEBUG
  RS-182: job-run-processing-TRAININGS.sh
  RS-182: usage info in scripts
  RS-182: scripts processing resources
  RS-182: documentation more consistent
  RS-182: dumps-size.sh and dumps-transfer.sh
  RS-182: dumps-ls.sh, Operations.md update, hadoop.sh refactored to print executed commands
  RS-182:  - generating a web-view urls in jobfile-push-to-cluster.sh,  - Operations.md updated with utility script internals,  - .load-settings.sh extracted to be shared by all utility scripts
  RS-182 Operations.md restructured, more todo-s
  RS-182 jobfile-push-to-cluster.sh and Operations.md update
  RS-182 Operations.md and hadoop.sh wrapper utility as base for automating actions taken on Hadoop cluster