HBASE-8781 ImmutableBytesWritable constructor with another IBW as param need to consider the offset of the passed IBW

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1499805 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8869 incorrect javadoc for CompactionRequest.compareTo()

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1499807 13f79535-47bb-0310-9956-ffa450edef68