HBASE-8755 A new write thread model for HLog to improve the overall HBase write throughput

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.98@1550782 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10155 HRegion isRecovering state is wrongly coming in postOpen hook

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.98@1550881 13f79535-47bb-0310-9956-ffa450edef68