{SIP,Asterisk}_Tests: Mark all components alive

This fixes some dynamic errors occuring due to messages arriving while
tests is being torn down.

Change-Id: I60642071758ad1203196eddd3bbacb84f4dcf9fb
diff --git a/library/SIP_Emulation.ttcn b/library/SIP_Emulation.ttcn
index 4aef536..559b575 100644
--- a/library/SIP_Emulation.ttcn
+++ b/library/SIP_Emulation.ttcn
@@ -237,7 +237,7 @@
 		create_cb := refers(SIP_Emulation.ExpectedCreateCallback)
 	};
 
-	ct := SIP_Emulation_CT.create(id);
+	ct := SIP_Emulation_CT.create(id) alive;
 	map(ct:SIP, system:SIP);
 	ct.start(SIP_Emulation.main(ops, id));
 }