Instead of having to modify the tst_databases.h file whenever you want
to add a test database, this will now read from a file to find what
databases are available. This defaults to dbs.json in the same directory
or the QT_TEST_DATABASES_FILE environment variable can be set to point
to the file that contains the databases. The latter makes it easier for
CI then to have something set up on a per configuration basis.
The SQLite database stays hardcoded so this will continue to be tested as
before without any additional changes.
Change-Id: I7e7ccde6a6be3e490dd640b1590e3b691a6b2ab3
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
e4fc098a53