NO-JIRA: CMake: Added missing test_wrap around stop_broker test.

The stop_broker test was being run without the test_wrap wrapper.  That meant it
was loading the default /etc/qpidd.conf, so the test would fail if that config
had any options defined by a module (since the tests dont load default modules.)

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1487501 13f79535-47bb-0310-9956-ffa450edef68