Bug 16443: [QA Follow-up] Add two tests for get_fields

Bug 16443: [QA Follow-up] Add two tests for get_fields

Adds t/db_dependent/Members/Statistics.t.

Test plan:
Run the test.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 30cf9ee277481b54ed75e500c38f328f2d82b831)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
(cherry picked from commit 03d51281b079c379a2fba0caf8a9df8ec9c6d500)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>