modules/terraform: Quote the variable values in the command line (#43493)

* modules/terraform: Quote the variable values in the command line

Fixes: #43492

* fix six import

lib/ansible/modules/cloud/misc/terraform.py

@@ -145,6 +145,7 @@ import os
 import json
 import tempfile
 import traceback
+from ansible.module_utils.six.moves import shlex_quote
 
 from ansible.module_utils.basic import AnsibleModule
 
@@ -296,7 +297,7 @@ def main():
     for k, v in variables.items():
         variables_args.extend([
             '-var',
-            '{0}={1}'.format(k, v)
+            shlex_quote('{0}={1}'.format(k, v))
         ])
     if variables_file:
         variables_args.extend(['-var-file', variables_file])