drop unused define

Change-Id: I2d7b181021563c82cf8c12ccf6d243ed0f026284
re-factoring: abstract compaction scheduler code into separate module

Change-Id: I694a8c51996053d930b3e2c494ec9ba186029487
MB-10273 new compaction daemon that schedules kv and view compactions

... independently

not implemented:
1. view compaction inhibition
2. support of non-parallel view/kv compaction

Change-Id: Ibb8518d688a5a58312cdd589c2924358ac70cfca