Changes Necessary to Switch from Thrift to CQL

[johnny-zheng]

We are moving away from using TwitterCassandra, so all checks referring directly to the TwitterCassandra class should be replaced with a more generic check.

[coveralls]

Coverage decreased (-1.2%) to 62.911% when pulling 1c1afb4 on thrift_to_cql_changes into da25563 on master.

[coveralls]

Coverage decreased (-60.0%) to 4.118% when pulling 6a3c233 on thrift_to_cql_changes into da25563 on master.

[coveralls]

Coverage decreased (-58.3%) to 5.851% when pulling 814dec3 on thrift_to_cql_changes into da25563 on master.

[coveralls]

Coverage decreased (-58.08%) to 6.03% when pulling 5e2c69f on thrift_to_cql_changes into da25563 on master.

[coveralls]

Coverage decreased (-58.08%) to 6.03% when pulling 9537ea2 on thrift_to_cql_changes into da25563 on master.

[coveralls]

Coverage decreased (-58.0%) to 6.154% when pulling 03ad193 on thrift_to_cql_changes into da25563 on master.