don't change dict during iteration

Author: yogo1212

library/usersdb.py

@@ -215,7 +215,8 @@ def expand_users(self):
             # 1-  Check for extra keys that dont translate to ansible user module
             if self.extract_extra_keys:
                 extra_user_data = None
-                for dic_key in user_options.keys():
+                user_options_keys = list(user_options.keys())
+                for dic_key in user_options_keys:
                     if dic_key not in USERVALUES:
                         # Add user and state
                         if not extra_user_data: