[FIX] hw_escpos: don't try too hard to close a printer

Although it might be a good idea to make sure a printer device is
properly closed, trying for >1 min to do so is too much. It can cause a
>1 min delay between receiving a receipt and actually printing. Also,
just because the device is not cleanly closed does not mean that it will
not work when we open it again.

addons/hw_escpos/escpos/printer.py

@@ -58,7 +58,7 @@ class Usb(Escpos):
                     return True
             except usb.core.USBError as e:
                 i += 1
-                if i > 100:
+                if i > 10:
                     return False
         
             sleep(0.1)