test/iscsi_tgt: silence shellcheck SC2029

This is detected by some shellcheck versions.
The wiki for this error tells us we should ignore it if we
know what we're doing.

Change-Id: I461dcceace652bc9abd1cfb9f6a2794b98016e96
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2429
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>

test/iscsi_tgt/perf/iscsi_target.sh

@@ -83,6 +83,8 @@ if [ $EUID -ne 0 ]; then
 fi
 
 function ssh_initiator() {
+	# shellcheck disable=SC2029
+	# (we want to expand $@ immediately, not on the VM)
 	ssh -i $HOME/.ssh/spdk_vhost_id_rsa root@$IP_I_SSH "$@"
 }