endp: require domain name also for E1 endpoints

RFC3435 requires an MGW domain name appeneded to every endpoints. When
defining endpoint names in Appendix E, the domain name is is not
mentioned for digital trunks, however, this does not mean that digital
trunks do not have a domain appended. Osmo-mgw currently violates the
spec because it explicitly checks if the domain name is _NOT_ present
for E1 endpoints.

Change-Id: Ibb800b689e090b97b58d0206959b660890acd967
Related: OS#2547
1 file changed