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