Merge pull request #4234 from chrisweaver/patch-1

Enforce `bool` type for dup_ok option on AWS `iam_cert` module

cloud/amazon/iam_cert.py

@@ -232,7 +232,7 @@ def main():
         new_name=dict(default=None, required=False),
         path=dict(default='/', required=False),
         new_path=dict(default=None, required=False),
-        dup_ok=dict(default=False, required=False, choices=[False, True])
+        dup_ok=dict(default=False, required=False, choices=[False, True], type='bool')
     )
     )