tmf: Fix some tests not working in different time zones

tmf: Fix some tests not working in different time zones

Also print the timezone at the start of test to help troubleshoot
if it happens on a server.

Change-Id: I4cd10054f4c767a4089e17447089e401ade19b6e
Signed-off-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/66579
Reviewed-by: Hudson CI
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>