Disable BG before a new test

applications/unb1_reorder/tb/python/tc_unb1_reorder.py

@@ -165,6 +165,9 @@ if __name__ == "__main__":
     if c_ena_pre_transpose:
         ss.write_selects(ss_list)
         
+    # Disable the blockgenerator before writing new data
+    bg.write_disable()
+        
     ###############################################################################
     #
     # Create stimuli for the BG