hnodeb: Add initial infra to emulate HNB LL socket iface

Change-Id: Ia864a672643a0e42f5afea6fd901e621478c87c0
diff --git a/hnodeb/HNB_Tests.default b/hnodeb/HNB_Tests.default
index a06dcc6..c385b9a 100644
--- a/hnodeb/HNB_Tests.default
+++ b/hnodeb/HNB_Tests.default
@@ -20,6 +20,7 @@
 *.STATSVTY.CTRL_CLIENT_CLEANUP_LINEFEED := "yes"
 *.STATSVTY.CTRL_DETECT_CONNECTION_ESTABLISHMENT_RESULT := "yes"
 *.STATSVTY.PROMPT1 := "OsmoHNodeB> "
+*.LLSK.socket_type := "SEQPACKET"
 
 [MODULE_PARAMETERS]
 Osmocom_VTY_Functions.mp_prompt_prefix := "OsmoHNodeB";