[stable gate fix] Check if cert_validate is supported

Also check if `cert_validate` is supported in building API tests.

Needed-By: https://review.opendev.org/707663
Needed-By: https://review.opendev.org/707760
Change-Id: Ic96f7becff2753ff72d5dd75bea75fadf21a036e
diff --git a/.zuul.yaml b/.zuul.yaml
index d43343a..7ffc818 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -71,10 +71,12 @@
         - heat-functional
         - heat-functional-non-apache
         - heat-functional-legacy
-        - heat-functional-convg-queens
-        - heat-functional-orig-queens
-        - heat-functional-convg-rocky
-        - heat-functional-orig-rocky
+        # block untill https://review.opendev.org/#/q/topic:fix-stable-gate+(
+        # status:open+OR+status:merged)+project:openstack/heat merged
+        #- heat-functional-convg-queens
+        #- heat-functional-orig-queens
+        #- heat-functional-convg-rocky
+        #- heat-functional-orig-rocky
         - heat-functional-convg-stein
         - heat-functional-orig-stein
         - heat-functional-convg-train