HBASE-8504 HTable.getRegionsInRange() should provide a non-cached API

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1485540 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8450 Update hbase-default.xml and general recommendations to better suit current hw, h2, experience, etc.

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1485561 13f79535-47bb-0310-9956-ffa450edef68