Embed HBaseTestingUtility to isolate tests

This change spins up an embedded HBase instance to run the core tests against.

I removed the 0.90 profile (per our IRC conversation) and added a CDH profile for cloudera distributions.

HBaseTestingUtility is pretty noisy, so we might consider suppressing info level messages in the future if it becomes a problem.  Exceptions are also thrown when the instance is shut down, but those exceptions are innocuous.

Note that with this change you can also load clojure-hbase.core-test in a repl and run (once-start) to write code against a running hbase instance.