[test] submodule call.

src/git-auth-helper.ts

@@ -341,10 +341,12 @@ class GitAuthHelper {
       }
     }
 
+    if (this.settings.submodules) {
       const pattern = regexpHelper.escape(configKey)
       await this.git.submoduleForeach(
         `git config --local --name-only --get-regexp '${pattern}' && git config --local --unset-all '${configKey}' || :`,
         true
       )
     }
+  }
 }