ACCUMULO-2314 Fix nit typographical/grammar issues.

Signed-off-by: Bill Havanki <bhavanki@cloudera.com>
Merge branch '1.4.5-SNAPSHOT' into 1.5.1-SNAPSHOT (-sours)
Merge branch '1.5.1-SNAPSHOT' into 1.6.0-SNAPSHOT
ACCUMULO-2318 making rename's second argument require a namespace
ACCUMULO-2316 No more namespacenotfound for table requests
ACCUMULO-2317 banishing loadDefault(String) and providing adequate documentation to the constructor