Merge pull request #47219 from garethgreenaway/vault_backward_compatibility

[2018.3] Fixing a backward compatibility issue with vault module & runner

salt/utils/vault.py

@@ -87,7 +87,7 @@ def _get_token_and_url_from_master():
     return {
             'url': result['url'],
             'token': result['token'],
-            'verify': result['verify'],
+            'verify': result.get('verify', None),
            }