Fix cron tests by disallowing CocoaPods 1.7.0.rc.1 (#2941)
Fix cron tests by disallowing CocoaPods 1.7.0.rc.1 (#2941)


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