HBASE-7878 recoverFileLease does not check return value of recoverLease (Ted Yu)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1450793 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7878 add debug log for recoverLease timeout



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1450883 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7878 Addendum for trying fs.append in case recoverLease throws exception



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1450924 13f79535-47bb-0310-9956-ffa450edef68