Speed Up Mongo Build When No Mongo

@Rule used a 10 second connection timeout.
Well. That's great catch!
However I'd use here `ServerAddress.defaultHost()` and why `100` isn't good for us?
Right now with runned Mongo I take for `gradlew clean :spring-integration-mongodb:testall` `Total time: 55.26 secs
`, but with stopped (and your `500`) `Total time: 1 mins 0.904 secs`. When with `100` just `Total time: 24.789 secs`.
WDYT?

And you should agree with me that we should backport it anyway