[scribus-dev] travis needs update

[JLuc]

travis errors :
« scribusproject/scribus/master (Jean Ghali): https://travis-ci.org/scribusproject/scribus/builds/200287027: The build 
has errored.

Detailed issue show "Cannot add PPA: 'ppa:beineri/opt-qt57-trusty'"
Fact is this package doens exist anymore, but qt571 does :
see https://launchpad.net/~beineri/+archive/ubuntu/opt-qt571-trusty

So travis build config should be edited to use ppa:beineri/opt-qt571-trusty

Can somebody fix this ?
(who is admin ?)

JLuc