HBASE-7644 Port HBASE-4802 'Disable show table metrics in bulk loader' to 0.94



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1437091 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7646 Make forkedProcessTimeoutInSeconds configurable

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1437132 13f79535-47bb-0310-9956-ffa450edef68