HBASE-19694 The initialization order for a fresh cluster is incorrect

Become active Master before calling the super class's run method. Have
the wait-on-becoming-active-Master be in-line rather than off in a
background thread (i.e. undo running thread in startActiveMasterManager)

Purge the fragile HBASE-16367 hackery that attempted to fix this issue
previously by adding a latch to try and hold up superclass RegionServer
until cluster id set by subclass Master.
4 files changed