psql: Add expected failures where the table name is case sensitive

Currently there is a bug in Qt regarding the PostgreSQL driver as it
does not correctly escape the table names when constructing queries
internally. Therefore, these tests are marked as expected failures until
the bug itself is fixed in Qt.

Change-Id: I74dadc187f8a08509128dfea27be99787e57ea51
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>