HBASE-8871  The region server can crash at startup

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1499922 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8867  HLogUtils#getServerNameFromHLogDirectoryName does not take into account the -splitting extension

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1499924 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8729: distributedLogReplay may hang during chained region server failure

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1499926 13f79535-47bb-0310-9956-ffa450edef68