ACCUMULO-3328 Write a log message when GC acquires ZK lock. Improve "wait" logic inside ReplicationIT for GC to run.
ACCUMULO-3289 Add logging to discern between application and network pauses for bulkImportFiles.
Merge branch '1.6'
ACCUMULO-3289 Increase memory as it appeared the one tserver might have had irregular timer thread activity
Merge branch '1.6'

Conflicts:
	test/src/test/java/org/apache/accumulo/test/functional/BulkFileIT.java
WIP
WIP