Use Osmocom-patched UNIX_DOMAIN_SOCKETasp for SEQPACKET support

Upstream TITAN doesn't have this yet (it's submitted, though),
so we have to use our own repo for titan.TestPorts.UNIX_DOMAIN_SOCKETasp
and at the same time make sure that our MNCC port is using
SEQPACKET in MSC_Tests.cfg

Change-Id: Ifa3661d8f818564d595c4612e5612a245a31a8f4
diff --git a/msc_tests/MSC_Tests.cfg b/msc_tests/MSC_Tests.cfg
index 5ffa322..2bd9dd2 100644
--- a/msc_tests/MSC_Tests.cfg
+++ b/msc_tests/MSC_Tests.cfg
@@ -13,6 +13,7 @@
 
 [TESTPORT_PARAMETERS]
 #*.*.udpReuseAddress := "yes";
+"MSC_Test-MNCC".MNCC.socket_type := "SEQPACKET";
 
 [MODULE_PARAMETERS]
 M3UA_Emulation.tsp_logVerbose := true;