Disable integration tests on Travis just for b1.4 branch
Disable integration tests on Travis just for b1.4 branch

ponkin/spark-cassandra-connector,christobill/spark-cassandra-connector,shashwat7/spark-cassandra-connector,maasg/spark-cassandra-connector,jimenefe/spark-cassandra-connector,ponkin/spark-cassandra-connector,jimenefe/spark-cassandra-connector,shashwat7/spark-cassandra-connector,datastax/spark-cassandra-connector,maasg/spark-cassandra-connector,datastax/spark-cassandra-connector,christobill/spark-cassandra-connector