Use certmonger D-Bus API instead of messing with its files.
FreeIPA certmonger module changed to use D-Bus to communicate with certmonger.
Using the D-Bus API should be more stable and supported way of using cermonger than
tampering with its files.
>=certmonger-0.75.13 is needed for this to work.
Reviewed-By: Jan Cholasta <firstname.lastname@example.org>