D11882: autotests: Use built executable instead of installed

[Stefan Brüns]

bruns commandeered this revision.
bruns added a reviewer: michaelh.

REPOSITORY
  R824 Baloo Widgets

REVISION DETAIL
  https://phabricator.kde.org/D11882

To: bruns, elvisangelaccio, #baloo, #frameworks, michaelh
Cc: astippich, bruns, alexeymin, gennad, domson, ashaposhnikov, spoorun, 
abrahams