ACCUMULO-2369 Increase the sleep time and add some comments as to why
Merge branch '1.5.1-SNAPSHOT' into 1.6.0-SNAPSHOT

Conflicts:
	start/src/test/java/org/apache/accumulo/start/classloader/vfs/AccumuloReloadingVFSClassLoaderTest.java
Merge branch '1.6.0-SNAPSHOT'