bsc: fix f_establish_fully(): first RSL should be EST IND, not DATA

Change-Id: Ia609b67c28ce07fa3bf33e3c4a5658046474d60a
diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index 63d017f..022cc63 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -650,7 +650,7 @@
 			f_rslem_register(0, new_chan_nr);
 			var PDU_ML3_MS_NW l3_tx := valueof(ts_RRM_AssignmentComplete('00'O));
 			/* send assignment complete over the new channel */
-			RSL.send(ts_RSL_DATA_IND(new_chan_nr, valueof(ts_RslLinkID_DCCH(0)),
+			RSL.send(ts_RSL_EST_IND(new_chan_nr, valueof(ts_RslLinkID_DCCH(0)),
 						 enc_PDU_ML3_MS_NW(l3_tx)));
 			/* by default, send via the new channel from now */
 			st.old_chan_nr := g_chan_nr;