HBASE-8883 TestAdmin.testCloseRegionWhenServerNameIsEmpty failed with ArrayIndexOutOfBoundsException

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1500822 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8879 Client Scanner spams the logs if there are lots of scanners.

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1500870 13f79535-47bb-0310-9956-ffa450edef68