[cloud] Support changeset_name parameter on CloudFormation stack create (#31436)

lib/ansible/modules/cloud/amazon/cloudformation.py

@@ -304,7 +304,8 @@ def list_changesets(cfn, stack_name):
 def create_changeset(module, stack_params, cfn):
     if 'TemplateBody' not in stack_params and 'TemplateURL' not in stack_params:
         module.fail_json(msg="Either 'template' or 'template_url' is required.")
-
+    if module.params['changeset_name'] is not None:
+        stack_params['ChangeSetName'] = module.params['changeset_name']
     try:
         changeset_name = build_changeset_name(stack_params)
         stack_params['ChangeSetName'] = changeset_name
@@ -507,8 +508,6 @@ def main():
     if module.params['stack_policy'] is not None:
         stack_params['StackPolicyBody'] = open(module.params['stack_policy'], 'r').read()
 
-    if module.params['changeset_name'] is not None:
-        stack_params['ChangeSetName'] = module.params['changeset_name']
 
     template_parameters = module.params['template_parameters']
     stack_params['Parameters'] = [{'ParameterKey':k, 'ParameterValue':str(v)} for k, v in template_parameters.items()]