gbproxy: Enable TC_load_sharing_dl based on modulepar; set that in FR test

Change-Id: I96e8b6a1a69148f770476e87c920dc256c1d7379
Related: OS#4520

gbproxy/GBProxy_Tests.fr.cfg

@@ -12,6 +12,7 @@
 *.GBPVTY.CTRL_HOSTNAME := "127.0.0.1"
 
 [MODULE_PARAMETERS]
+GBProxy_Tests.mp_enable_load_sharing := true;
 GBProxy_Tests.mp_nsconfig_sgsn := {
 	{
 		handle_sns := false

gbproxy/GBProxy_Tests.ttcn

@@ -44,6 +44,7 @@ const BcdMccMnc c_mcc_mnc := '262F42'H;
 const integer max_fr_info_size := 1600;
 
 modulepar {
+	boolean mp_enable_bss_load_sharing := false;
 	/* SGSN NS configuration */
 	NSConfigurations mp_nsconfig_sgsn := {
 		{
@@ -2291,7 +2292,7 @@ control {
 	execute( TC_bvc_reset_sig_from_bss() );
 	execute( TC_bvc_reset_ptp_from_sgsn() );
 	execute( TC_bvc_reset_sig_from_sgsn() );
-	if (false) {
+	if (mp_enable_bss_load_sharing) {
 		/* don't enable this by default, as we don't yet have any automatic test setup for FR with 4 NS-VC */
 		execute( TC_load_sharing_dl() );
 	}