[SER-2112] Push: store the error fcm returns even if there's no error mapper#5718

ArtursKadikis merged 2 commits intomasterCountly/countly-server:masterfrom

SER-2112-push-better-error-reporting-for-fcmCountly/countly-server:SER-2112-push-better-error-reporting-for-fcmCopy head branch name to clipboard