slapos_subscription_request: do not crash if subscription could not be created anymore

master/bt5/slapos_subscription_request/SkinTemplateItem/portal_skins/slapos_subscription_request/SubscriptionRequest_validateIfSubmitted.py

@@ -62,6 +62,7 @@ if 0 < total_price:
     else:
       project = subscription_request.getSourceProjectValue()
 
+    try:
       subscription_change_request = subscription_request.getResourceValue().Resource_createSubscriptionRequest(
         subscription_request.getDestinationValue(),
         # [software_type, software_release],
@@ -72,6 +73,9 @@ if 0 < total_price:
         item_value=item,
         causality_value=subscription_request.getCausalityValue()
       )
+    except AssertionError:
+      pass
+    else:
       if subscription_change_request.getSpecialise() != subscription_request.getSpecialise():
         # We have a matching Trade Condition.
         # We can recreate the Subscription Request