Don't mask CASSANDRA_INCLUDE if it's already present.
Don't mask CASSANDRA_INCLUDE if it's already present.

rightscale/cassandra,cassandra-rb/cassandra,stipple/cassandra_new,stipple/cassandra_new,rightscale/cassandra,rightscale/cassandra,cassandra-rb/cassandra,cassandra-rb/cassandra,stipple/cassandra_new,cassandra-rb/cassandra,stipple/cassandra_new