test/nvmf: use --transport=rdma in nvmf.sh

We also no longer hardcode TEST_TRANSPORT=rdma.  Users
of the individual test scripts must now explicitly
pass --transport=rdma.  Support for tcp will be coming
in future patches.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I819d69cb0906eb27b692eb2755aca5085298d779

Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/456685
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Seth Howell <seth.howell5141@gmail.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

test/common/autotest_common.sh

@@ -201,7 +201,6 @@ if [ -z "$output_dir" ]; then
 fi
 
 TEST_MODE=
-TEST_TRANSPORT=rdma
 for i in "$@"; do
 	case "$i" in
 		--iso)

test/nvmf/common.sh

@@ -157,6 +157,10 @@ function nvmfcleanup()
 
 function nvmftestinit()
 {
+	if [ -z $TEST_TRANSPORT ]; then
+		echo "transport not specified - use --transport= to specify"
+		return 1
+	fi
 	if [ "$TEST_MODE" == "iso" ]; then
 		$rootdir/scripts/setup.sh
 		rdma_device_init

test/nvmf/nvmf.sh

@@ -13,7 +13,7 @@ timing_enter nvmf_tgt
 
 trap "exit 1" SIGINT SIGTERM EXIT
 
-TEST_ARGS=
+TEST_ARGS=--transport=rdma
 
 run_test suite test/nvmf/target/filesystem.sh $TEST_ARGS
 run_test suite test/nvmf/target/discovery.sh $TEST_ARGS