Actually run all the Cinder cert tests.

Change the tests to run on the tox invocation line, too, not just in
the message logged.

Change-Id: I86e02ea5a5eace92397bc18e08c494c6fd009880
diff --git a/driver_certs/cinder_driver_cert.sh b/driver_certs/cinder_driver_cert.sh
index 2757038..d066e06 100755
--- a/driver_certs/cinder_driver_cert.sh
+++ b/driver_certs/cinder_driver_cert.sh
@@ -94,7 +94,7 @@
 
 # run tempest api/volume/test_*
 log_message "Run the actual tempest volume tests (./tools/pretty_tox.sh volume)...", True
-./tools/pretty_tox.sh api.volume 2>&1 | tee -a $TEMPFILE
+./tools/pretty_tox.sh volume 2>&1 | tee -a $TEMPFILE
 if [[ $? = 0 ]]; then
     log_message "CONGRATULATIONS!!!  Device driver PASSED!", True
     log_message "Submit output: ($TEMPFILE)"