Tal Levy f5b23df349 add more force-merge related steps and tests
The force-merge is an a TODO state due to the
unresolved issue around best_compression.

- updated ReadOnlyStep with tests
- implemented an update to the ForceMergeAction
- added UpdateBestCompressionSettingsStep
- added tests for SegmentCountStep
2018-04-09 16:28:25 -07:00
..