HBASE-10319 HLog should roll periodically to allow DN decommission to eventually complete

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1564249 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10457 Print corrupted file information in SnapshotInfo tool without -file option (Bharath Vissapragada)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1564429 13f79535-47bb-0310-9956-ffa450edef68