ACCUMULO-378 Some more test stabilization
ACCUMULO-378 Core review fixes from bhavanki for replication
ACCUMULO-2255 pulled 6 classes out of TabletServer, moved GC checking to a new class, add "final" to many members, grouped members together, changed many public items to private
ACCUMULO-2840 turn audit logging back on for the IT
ACCUMULO-2840 turn audit logging back on for the IT
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-378 Duplicative logging
ACCUMULO-2858 Ensure that we only look for 'sync' when we couldn't load configured method
Merge branch '1.5.2-SNAPSHOT' into 1.6.1-SNAPSHOT

Conflicts:
	server/tserver/src/main/java/org/apache/accumulo/tserver/log/DfsLogger.java
Merge branch '1.6.1-SNAPSHOT'

Conflicts:
	server/tserver/src/main/java/org/apache/accumulo/tserver/log/DfsLogger.java
Merge remote-tracking branch 'origin/master' into ACCUMULO-378

Conflicts:
	server/tserver/src/main/java/org/apache/accumulo/tserver/TabletServer.java
ACCUMULO-378 More test stabilization