[cloud] new module lambda_policy (PR #24951)

- Fixes to lambda
- reformatting + tests for lambda_facts
- lambda module integration test
- switch lambda and lambda_facts to AnsibleAwsModule
- Get the account ID from STS, GetUser, and finally error message

test/integration/targets/aws_lambda_policy/files/mini_http_lambda.py

@@ -0,0 +1,36 @@
+from __future__ import print_function
+import json
+
+
+def handler(event, context):
+    """
+    The handler function is the function which gets called each time
+    the lambda is run.
+    """
+    # printing goes to the cloudwatch log allowing us to simply debug the lambda if we can find
+    # the log entry.
+    print("got event:\n" + json.dumps(event))
+
+    # if the name parameter isn't present this can throw an exception
+    # which will result in an amazon chosen failure from the lambda
+    # which can be completely fine.
+
+    name = event["pathParameters"]["greet_name"]
+
+    return {"statusCode": 200,
+            "body": 'hello: "' + name + '"',
+            "headers": {}}
+
+
+def main():
+    """
+    This main function will normally never be called during normal
+    lambda use.  It is here for testing the lambda program only.
+    """
+    event = {"name": "james"}
+    context = None
+    print(handler(event, context))
+
+
+if __name__ == '__main__':
+    main()