HBASE-9869 Optimize HConnectionManager#getCachedLocation

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1542688 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9983 Lower the memory footprint of HRegionLocation

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1542694 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9869 Optimize HConnectionManager#getCachedLocation - remove SoftValueSortedMap

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1542699 13f79535-47bb-0310-9956-ffa450edef68