add support for stack policies in cloudformation

cloud/amazon/cloudformation.py

@@ -60,6 +60,13 @@ options:
     required: true
     default: null
     aliases: []
+  stack_policy:
+    description:
+      - the path of the cloudformation stack policy
+    required: false
+    default: null
+    aliases: []
+    version_added: "x.x"
   tags:
     description:
       - Dictionary of tags to associate with stack and it's resources during stack creation. Cannot be updated later.
@@ -196,6 +203,7 @@ def main():
             template_parameters=dict(required=False, type='dict', default={}),
             state=dict(default='present', choices=['present', 'absent']),
             template=dict(default=None, required=True),
+            stack_policy=dict(default=None, required=False),
             disable_rollback=dict(default=False, type='bool'),
             tags=dict(default=None)
         )
@@ -208,6 +216,10 @@ def main():
     state = module.params['state']
     stack_name = module.params['stack_name']
     template_body = open(module.params['template'], 'r').read()
+    if module.params['stack_policy'] is not None:
+        stack_policy_body = open(module.params['stack_policy'], 'r').read()
+    else:
+        stack_policy_body = None
     disable_rollback = module.params['disable_rollback']
     template_parameters = module.params['template_parameters']
     tags = module.params['tags']
@@ -244,6 +256,7 @@ def main():
         try:
             cfn.create_stack(stack_name, parameters=template_parameters_tup,
                              template_body=template_body,
+                             stack_policy_body=stack_policy_body,
                              disable_rollback=disable_rollback,
                              capabilities=['CAPABILITY_IAM'],
                              **kwargs)
@@ -264,6 +277,7 @@ def main():
         try:
             cfn.update_stack(stack_name, parameters=template_parameters_tup,
                              template_body=template_body,
+                             stack_policy_body=stack_policy_body,
                              disable_rollback=disable_rollback,
                              capabilities=['CAPABILITY_IAM'])
             operation = 'UPDATE'