Miscellaneous pylint fixes.

The following rules are no longer disabled:

- bad-format-string
- duplicate-key
- lost-exception
- trailing-newlines
- unexpected-keyword-arg
- useless-suppression
- using-constant-test

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

@@ -293,4 +293,3 @@ def main():
 
 if __name__ == '__main__':
     main()
-