qtmod_test: run autotests _after_ installing Qt
qtmod_test: run autotests _after_ installing Qt

These two steps were done in the wrong order.  When Qt is configured
for installing, it must be installed before any autotests or tools
will work.

Change-Id: Ib23b35cc7c35b6e8a6e75c6a9351c0108e7c6d64
Reviewed-on: http://codereview.qt.nokia.com/2492
Reviewed-by: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Sergio Ahumada <27ca633ce817d1c3858ceeac3c99febb78411853@nokia.com>

tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa