When encountering an exception during connection.close(), make a best effort to clean up before
throwing the error.
Revised test.  Deleting a topic with active producers and consumers correctly has undetermined behavior.
Close things before deleting.
Updated dependencies to something a little more modern.
Updated versions.
Fixed swallowed InterruptException.
Merge branch 'master' of github.com:skyscreamer/nevado into fix_test_topics
Merge pull request #41 from skyscreamer/fix_test_topics

Topic test, interrupt, and pom.xml