Make configparser imports python3 ready

the ConfigParser module was renamed to configparser in Python3.  Use
six.moves to import it so that the modules will function on Python3.

lib/ansible/modules/database/misc/mongodb_user.py

@@ -189,9 +189,10 @@ EXAMPLES = '''
 
 '''
 
+import os
 import ssl as ssl_lib
-import ConfigParser
 from distutils.version import LooseVersion
+
 try:
     from pymongo.errors import ConnectionFailure
     from pymongo.errors import OperationFailure
@@ -207,6 +208,11 @@ except ImportError:
 else:
     pymongo_found = True
 
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.pycompat24 import get_exception
+from ansible.module_utils.six.moves import configparser
+
+
 # =========================================
 # MongoDB module specific support methods.
 #
@@ -279,7 +285,7 @@ def user_remove(module, client, db_name, user):
         module.exit_json(changed=False, user=user)
 
 def load_mongocnf():
-    config = ConfigParser.RawConfigParser()
+    config = configparser.RawConfigParser()
     mongocnf = os.path.expanduser('~/.mongodb.cnf')
 
     try:
@@ -288,7 +294,7 @@ def load_mongocnf():
             user=config.get('client', 'user'),
             password=config.get('client', 'pass')
         )
-    except (ConfigParser.NoOptionError, IOError):
+    except (configparser.NoOptionError, IOError):
         return False
 
     return creds
@@ -446,9 +452,6 @@ def main():
 
     module.exit_json(changed=True, user=user)
 
-# import module snippets
-from ansible.module_utils.basic import *
-from ansible.module_utils.pycompat24 import get_exception
 
 if __name__ == '__main__':
     main()