Timestamp and capabilities were missing. One of the very special flick
test cases needs to be fixed, because setting the proper timestamp
will now generate correct velocities. A potentially dangerous, legacy
implementation of flick() has also been updated to match how QTestLib
works in Qt 5.

Change-Id: Ibc99f7212ba21d41a419eaadac2fdda730658dc6
Reviewed-by: Martin Jones <martin.jones@nokia.com>