[FAB-11659] Fabric UT Failure

func TestSetServerRootCAs, TestSetMessageSize and
TestNewConnection uses same ports 8358/8359, which causes UT failure.

This PR update ports used in TestSetServerRootCAs & TestSetMessageSize
to 18358/18359 respectively.

Change-Id: I8634c5b768060e7201c4dc46889e9b7741cce50a
Signed-off-by: Krishna Harsha Voora <krishvoor@in.ibm.com>

core/comm/client_test.go

@@ -381,7 +381,7 @@ func TestSetServerRootCAs(t *testing.T) {
 	}
 
 	// set up test TLS server
-	address := "localhost:8358"
+	address := "localhost:18358"
 	lis, err := net.Listen("tcp", address)
 	if err != nil {
 		t.Fatalf("failed to create listener for test server: %v", err)
@@ -430,7 +430,7 @@ func TestSetServerRootCAs(t *testing.T) {
 
 func TestSetMessageSize(t *testing.T) {
 	t.Parallel()
-	address := "localhost:8359"
+	address := "localhost:18359"
 
 	// setup test server
 	srv, err := comm.NewGRPCServer(address, comm.ServerConfig{})