D26303: Remove endl in qDebug as it's already add "\n" + port to Qt::endl in qt5.15

[Aleix Pol Gonzalez]

apol accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R309 KService

BRANCH
  port_endl (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D26303

To: mlaurent, dfaure, apol
Cc: apol, kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns