SCCP_Tests.default: Use "SccpDemoUser" as VTY prompt

It seems that our TTCN3 VTY/Telnet module no longer supports '-'
inside prompt.  However, older sccp_demu_user programs in
libosmo-sccp.git before Change-Id
I4b6d7dd6fdf7521a4a9071e50ac1dcb2993c74bb use this.

Let's adjust our expectation here to the new dash-less variant.

Change-Id: Ib00f1f89bf1484d8a8e07be8c0a1fc849bcf03a0
diff --git a/sccp/SCCP_Tests.default b/sccp/SCCP_Tests.default
index 95e0d2f..f837664 100644
--- a/sccp/SCCP_Tests.default
+++ b/sccp/SCCP_Tests.default
@@ -16,7 +16,7 @@
 *.SCCP_DEMO_USER_VTY.CTRL_READMODE := "buffered"
 *.SCCP_DEMO_USER_VTY.CTRL_CLIENT_CLEANUP_LINEFEED := "yes"
 *.SCCP_DEMO_USER_VTY.CTRL_DETECT_CONNECTION_ESTABLISHMENT_RESULT := "yes"
-*.SCCP_DEMO_USER_VTY.PROMPT1 := "sccp-demo-user> "
+*.SCCP_DEMO_USER_VTY.PROMPT1 := "SccpDemoUser> "
 
 [MODULE_PARAMETERS]
 M3UA_Emulation.tsp_logVerbose := true;
@@ -35,7 +35,7 @@
 	}
 };
 
-Osmocom_VTY_Functions.mp_prompt_prefix := "sccp-demo-user";
+Osmocom_VTY_Functions.mp_prompt_prefix := "SccpDemoUser";
 
 [MAIN_CONTROLLER]