HBASE-9875 Removing the empty file NamespaceJanitor
HBASE-11849 remove classes with audience.private for internals that we don't use.

Signed-off-by: Jonathan M Hsieh <jmhsieh@apache.org>
HBASE-11844 region_mover.rb load enters an infinite loop if region already present on target server (Stephen Veiss)
HBASE-11856 hbase-common needs a log4j.properties resource for handling unit test logging output
HBASE-11846 HStore#assertBulkLoadHFileOk should log if a full HFile verification will be performed during a bulkload (Esteban Gutierrez)
HBASE-11859 'hadoop jar' references in documentation should mention hbase-server.jar, not hbase.jar