Travis GoogleUtilities :  skip Swift tests when --use-libraries (#6735)
Travis GoogleUtilities :  skip Swift tests when --use-libraries (#6735)

* Travis GoogleUtilities :  skip Swift tests when --use-libraries

* Temporary enable cron tests for PRs to check

* Revert temp change
firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk