HBASE-8645 Change ServerName so it uses hostname only, not FQDN hostnames

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1490073 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8684: Table Coprocessor can't access external HTable by default - ADDENDUM: moving test to correct package

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1490075 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8402 ScanMetrics depends on number of rpc calls to the server

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1490093 13f79535-47bb-0310-9956-ffa450edef68