remsim: server: TC_connect_{client,bankd}_duplicate

Add two new tests for the remsim-server, which simulate what happens
if a client or bankd with identical ID connects twice.  We expect
the second connection to get rejected at RSPRO level, and to be closed.

Change-Id: I29023f6b5ba430338c77bf01508c81bd6d8c99fa
Ralated: OS#5527
diff --git a/remsim/RSPRO.asn b/remsim/RSPRO.asn
index faf9cec..5e2c05b 100644
--- a/remsim/RSPRO.asn
+++ b/remsim/RSPRO.asn
@@ -87,6 +87,7 @@
 	illegalSlotId			(3),
 	unsupportedProtocolVersion	(4),
 	unknownSlotmap			(5),
+	identityInUse			(6),
 
 	-- no card is present in given slot
 	cardNotPresent			(100),