used completed Future in one place to fail, which doesn't work
enabled and added a few more tests

Signed-off-by: alexlehm <alexlehm@gmail.com>
changed tests to use VertxTestBase and report success/failure correctly
not quite there yet, unexpected exceptions not reported correctly, but the tests will fail due to timeout
on the CountDownLatch

Signed-off-by: alexlehm <alexlehm@gmail.com>