Becaues the database objects were created as globals, there was a
possible use-after-free issue when deleting the objects on application
exit.
Move the initialization of the database objects into static variables
inside the test constructor.
As a drive-by, also add one missing test to the CMake projects.
Fixes: QTBUG-85357
Change-Id: I2c8f2c5daee96bb9d1d21dae37950a2da5ffdf27
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
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