e1: encode line number as trunk number in MGCP endpoint

The MGCP endpoint name, that is generated when an E1 endpoint is
selected does have a hardcoded trunk id number, which is permanantly set
to 1. Lets use the E1 line number instead.

Related: OS#2547
Change-Id: Ic5447bb4426e31d119667bdfddfd2c91fd591fc6
1 file changed