cassandra-maven-plugin: CMP-10. Cassandra Maven Plugin should write status to system.log

issue: https://jira.kiji.org/browse/CMP-10
review: https://review.kiji.org/r/2101
commit: https://github.com/kijiproject/cassandra-maven-plugin/commit/f996510711a13b90c64831f2b1a3d6fe03ab5337