BSSGP_Emulation: Send BssgpResetIndication when PTP BVC are being reset

This notifies the user via the MGMT port about the fact that an inbound
BVC-RESET procedure just happened.

Change-Id: I54d0d5e0e06a330a90dfb1da06062d65022efe81
diff --git a/gbproxy/GBProxy_Tests.ttcn b/gbproxy/GBProxy_Tests.ttcn
index df32174..78eb389 100644
--- a/gbproxy/GBProxy_Tests.ttcn
+++ b/gbproxy/GBProxy_Tests.ttcn
@@ -384,6 +384,9 @@
 	[] SGSN_MGMT.receive(BssgpStatusIndication:{*, ?, ?}) {
 		repeat;
 		}
+	[] SGSN_MGMT.receive(BssgpResetIndication:?) {
+		repeat;
+		}
 	[] SGSN_MGMT.receive {
 		setverdict(fail, "Received unexpected message on SGSN_MGMT");
 		mtc.stop;