Remove superflous test for async broker lifecycle
Remove superflous test for async broker lifecycle

The lifecyle of a *broker* is the same for synchronous and asynchronous brokers

matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests