Updated to cassandraunit 1.1.2.1 and therefore Cassandra 1.2.0.

Fixed integration tests to work with the new Cassandra version.

Disabled WhenManagedCassandraLifecycleIsManaged tests as the mocking fails.

Integration tests are run in forked mode to create a separate JVM for each test.

Change-Id: I527425165e44148461d5219d7d861fa713dfff4d
Merge pull request #76 from Microtask/master

Updated to cassandra-unit 1.1.2.1 and therefore to Cassandra 1.2.0.