LCLS: Introduce a copy+pasted f_connect_handler() function

... using the original one is hitting a ttcn3_compiler bug in
TITAN 6.3.1, see https://www.eclipse.org/forums/index.php/m/1789918/

Change-Id: I7c2dfd3c6e63b54c019fba0c07a1bb777d68f6b5
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 3830e7d..f99d46b 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -1432,7 +1432,7 @@
 type function void_fn(charstring id) runs on MSC_ConnHdlr;
 
 /* helper function to create and connect a MSC_ConnHdlr component */
-function f_connect_handler(inout MSC_ConnHdlr vc_conn) runs on test_CT {
+private function f_connect_handler(inout MSC_ConnHdlr vc_conn) runs on test_CT {
 	connect(vc_conn:BSSMAPEM, g_bssap.vc_BSSMAP:PROC);
 	connect(vc_conn:MGCP_PROC, vc_MGCP:MGCP_PROC);
 	connect(vc_conn:RSL, bts[0].rsl.vc_RSL:CLIENT_PT);