bts-oml: Wait for SwActivatedRep before opstarting BTS nm obj

According to TS 12.21 attribute setting is done after the object becomes
sw installed.

Change-Id: I942c55df8ac8af22593e31ac4c501f644e9bee35
diff --git a/bts/BTS_Tests_OML.ttcn b/bts/BTS_Tests_OML.ttcn
index 4835e66..dc1b7ce 100644
--- a/bts/BTS_Tests_OML.ttcn
+++ b/bts/BTS_Tests_OML.ttcn
@@ -507,6 +507,13 @@
 	var OML_FOM_ObjectClass obj_class := NM_OC_BTS;
 	var OML_FOM_ObjectInstance obj_inst := valueof(ts_OML_ObjectInstance(g_bts_nr, 255, 255));
 
+	alt {
+	[] OML.receive(tr_OML_SwActivatedRep(NM_OC_BTS, ts_OML_ObjectInstance(g_bts_nr, 255, 255))) {
+		setverdict(pass);
+		}
+	[] OML.receive { repeat; }
+	}
+
 	f_oml_bts_attr();
 	f_oml_opstart(obj_class, obj_inst);
 }