kwayland's testRemoteAccess still flaky

[David Faure]

https://build.kde.org/job/Frameworks/view/Platform%20-%20SUSEQt5.12/job/kwayland/job/kf5-qt5%20SUSEQt5.12/149/testReport/junit/projectroot.autotests/client/kwayland_testRemoteAccess/

d_ed: looks like https://phabricator.kde.org/D28892 wasn't enough to make it fully stable, can you have another look?

-- 
David Faure, faure at kde.org, http://www.davidfaure.fr
Working on KDE Frameworks 5