Resolve L2SDP-881

Closes L2SDP-881

applications/lofar2/designs/lofar2_unb2b_ring/tb/vhdl/tb_tb_lofar2_unb2b_ring.vhd

@@ -40,7 +40,7 @@ ARCHITECTURE tb OF tb_tb_lofar2_unb2b_ring IS
   CONSTANT c_nof_rn   : NATURAL := 3;
   CONSTANT c_nof_tb   : NATURAL := 5;
   SIGNAL   tb_end_vec : STD_LOGIC_VECTOR(c_nof_tb-1 DOWNTO 0) := (OTHERS => '0');  
-  SIGNAL   tb_end     : STD_LOGIC;  -- declare tb_end to avoid 'No objects found' error on 'when -label tb_end'
+  SIGNAL   tb_end     : STD_LOGIC;  -- declare tb_end as STD_LOGIC to avoid 'No objects found' error on 'when -label tb_end' in *.do file
 BEGIN
 
 --    g_multi_tb            : BOOLEAN              := FALSE;