HBASE-9711 Improve HBASE-9428 - avoid copying bytes for RegexFilter unless necessary

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1530059 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9714 add scan logging to IntegrationTestLoadAndVerify

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1530065 13f79535-47bb-0310-9956-ffa450edef68