Keep track of how many HashDbIngestModule instances there are per job and only post one summary inbox message per job.
Merge remote-tracking branch 'upstream/develop' into mt-onemsg

Conflicts:
	HashDatabase/src/org/sleuthkit/autopsy/hashdatabase/HashDbIngestModule.java
Make jobID private. Remove now-unused members.
Rename refMap and its mutator methods
Added comment about what the map is mapping
Merge pull request #591 from SynapticNulship/mt-onemsg

HashDB one msg per job