Trivial Fixes

* Warn statement when a race condition is met with a null host. Useful if nodes are flapping.
* Proper use of clearing coordinators.
* Clearer error messages.
* Allocate two more nodes for multi-dc setups.
* Add ability to call maven clean or before building full coverage.
* Add ability to build test docs via `coverage`.
* Have `coverage` check to see if dependencies are up to date.