HBASE-7441 Make ClusterManager in IntegrationTestingUtility pluggable

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1432251 13f79535-47bb-0310-9956-ffa450edef68
HBASE-6824. Introduce ${hbase.local.dir} and save coprocessor jars there

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1432282 13f79535-47bb-0310-9956-ffa450edef68