MB-15546 Indexer: Set buildDoneAck for Catchup Index In Recovery
MB-15546 Indexer: Set buildDoneAck for Catchup Index In Recovery

There can cases where the build is complete and index has moved to catchup.
But due to recovery the stream needs to be restarted before merge. In such
cases, timekeeper needs to set buildDoneAck to true on stream open.

Change-Id: I62310986ccab87cd820ed378fea8aa13b83d4827

jchris/indexing,jchris/indexing,jchris/indexing,jchris/indexing