Squish: Clean up before and after Qml debugging

Change-Id: I592842964984b51669b773a9af1fdd81df032f7b
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Squish: Added test for session handling

Change-Id: Ie177c4f86bb09e14c26babf63127d48871c09cfb
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Squish: Fix strange infinite waitFor()

This caused WELP02 to wait forever on one testing machine although
running fine on local and other testing machines.

Change-Id: Ie66c3197f63f6f3224993107d039b0cf4b817483
Reviewed-by: Robert Loehning <robert.loehning@digia.com>