tests with rebalance in/out with replication-mismatch-2-gateways

command lines to run:
CONF_FILE=cluster_android_cb node tests/cluster_tests/cbl-replication-mismatch-2-gateways-rebalanceout.js
CONF_FILE=cluster_android_cb node tests/cluster_tests/cbl-replication-mismatch-2-gateways-rebalancein.js