-Fix vertx test failures
-update vertx version to 2.1.1
Merge pull request #1685 from gaohoward/master_vertx_testfix

Fix vertx test failures and update vertx version to 2.1.1
fix notification test and assure that CLUSTER_CONNECTION_START is always sent first
added check for null
Merge pull request #1687 from andytaylor/master-fix

couple of test fixes
fix isSharedStore method on HAPolicy to work when colocated
fixed colocated failover example
fixed colocated failover recovery example
added scale down example
https://bugzilla.redhat.com/show_bug.cgi?id=1115300 https://issues.jboss.org/browse/HORNETQ-1365 use waitforonmessage when the MDB is being interrupted