Changes

templates: also fix asp config in osmo-{bsc,sgsn}.cfg.tmpl

In change [1] I attempted to fix osmo-gsm-tester_virtual, but I did
not notice that the same problem also was in osmo-bsc.cfg.tmpl.

Also add the missing params to osmo-sgsn.cfg.tmpl.

Change-Id: I7b3adfa131a9dbb867b9ae68615da27191b021e5
Related: [1] Ie29589b46c65707089ff2b22c3b139b7b435cc95