temporary remove YodaCOnditionsFixer
Merge remote-tracking branch 'upstream/master'
Remove leading slashes in use clauses.

Addresses FriendsOfPHP/PHP-CS-Fixer#705
RemoveLeadingSlashUseFixer - change priority
RemoveLeadingSlashUseFixer - changing to symfony level
RemoveLeadingSlashUseFixer - expanding tests to validate against other valid uses of T_USE