always use symfony full-stack for travis
always use symfony full-stack for travis

Testing with separate versions has to many failures with diffing versions

rollerworks/PasswordStrengthBundle,sstok/PasswordStrengthBundle,rollerworks/PasswordStrengthValidator,Soullivaneuh/PasswordStrengthBundle,hlecorche/PasswordStrengthBundle,sstok/PasswordStrengthValidator