add to grpc_xds_k8s.sh

tools/internal_ci/linux/grpc_xds_k8s.sh

@@ -143,6 +143,10 @@ main() {
   # Run tests
   cd "${TEST_DRIVER_FULL_DIR}"
   run_test baseline_test
+  run_test change_backend_service_test
+  #run_test failover_test  # TODO(ericgribkoff) Needs secondary region cluster
+  run_test remove_neg_test
+  run_test round_robin_test
   run_test security_test
 }