Implement CM5 and CDH5 support
Add example defaults locking to CM/CDH version and support Cloudera distributed JDK 1.7
Support coexisting CDH4 and CDH5 deployments with same config, useful for integration test suites
Update CentOS AMI integration test config
Ensure CM5/CDH4 integration tests work, by exlcuding/including Impala Catalog Server as necessary
Reduce integration test permutations
Merge pull request #47 from ggear/graham-patch-CDH-15508

CDH-15508: Update Whirr-CM to support CM5 / CDH5