HBASE-9093 HBase client API: Restore the writeToWAL method in 0.95 (Hari Shreedharan)

Re-added to the 0.95 branch as deprecated methods.




git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1511337 13f79535-47bb-0310-9956-ffa450edef68