Changes

jobs/ttcn3-testsuites-testenv: mme: use -c all

Adjust to MME tests now having two configurations in osmo-ttcn3-hacks:

[testenv] Found multiple testenv.cfg files, use one of:
[testenv]  -c emergency
[testenv]  -c generic
[testenv] You can also select all of them (-c all) or use the * character as wildcard.

Related: osmo-ttcn3-hacks I3d84486dd3826d0f60a3c06693118e36b01ecd2b
Change-Id: Id2296c7cfe1660cc443f08efea209f8bf61aa8b6