But this one is a little different, because it's failing a template defined constraint, not one hidden inside a resource property schema, so the fix is likely to be different.
The quickest fix for this one is to remove or comment out the parameter constraint in the template, as has been proposed by Dan, I'll look into possible Heat-level solutions, but landing the fix for the properties validation seems most urgent, as that can't be disabled via the template.
This is related to the following heat bugs (which are all really the same):
https:/ /bugs.launchpad .net/heat/ +bug/1401317 /bugs.launchpad .net/heat/ +bug/1407100 /bugs.launchpad .net/heat/ +bug/1407877
https:/
https:/
But this one is a little different, because it's failing a template defined constraint, not one hidden inside a resource property schema, so the fix is likely to be different.
The quickest fix for this one is to remove or comment out the parameter constraint in the template, as has been proposed by Dan, I'll look into possible Heat-level solutions, but landing the fix for the properties validation seems most urgent, as that can't be disabled via the template.