osmo-mgw.cfg: add missing statsd configuration

The recently added test TC_dlcx_wildcarded depends on statsd information
from osmo-mgw but in the osmo-mgw configuration no statsd is configured.

Change-Id: I35e07a6b1853234559ab4d7e044f3899e8d0a3e8
Related: SYS#5535
1 file changed