osmo-msc: configure HLR address

In db59bcf9fcdc5f05fdb9047b905ab497472440bc we added a configured GSUP server
address for the osmo-hlr, but the osmo-msc is still trying to connect to
127.0.0.1.

In the same way as for mgcpgw, add conf_for_msc() to OsmoHLR, and use that to
configure the HLR's address in osmo-msc.cfg.

Related: OS#2320
Change-Id: I005aa160c679fc92b248abd762888959bd5b2c55
diff --git a/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl
index c52d0dc..247365e 100644
--- a/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl
@@ -28,3 +28,5 @@
  esme test
   password test
   default-route
+hlr
+ remote-ip ${hlr.ip_address.addr}