tests: metrolyrics with encoded url
tests: metrolyrics with encoded url

Check that we don't create invalid requests for the metrolyrics server

https://bugzilla.gnome.org/show_bug.cgi?id=764814

grilofw/grilo-plugins,jasuarez/grilo-plugins,GNOME/grilo-plugins,GNOME/grilo-plugins,MikePetullo/grilo-plugins,MikePetullo/grilo-plugins,grilofw/grilo-plugins,MikePetullo/grilo-plugins,jasuarez/grilo-plugins