[BUGFIX] Allow Travis failures with PHP 7.0
[BUGFIX] Allow Travis failures with PHP 7.0

Temporarily allow failures with PHP 7.0 as the sniffs from the
TYPO3SniffPool are not found in PHP 7.0:

https://github.com/typo3-ci/TYPO3SniffPool/issues/78

jjriv/emogrifier,MyIntervals/emogrifier,Synchro/emogrifier,OzzyCzech/emogrifier,ernsto/emogrifier