[FIX] hw_escpos: opening pulse cashdrawer
[FIX] hw_escpos: opening pulse cashdrawer

Some cashdrawers will not open when the command is send. This can be
solved by sending a longer opening pulse.

Used fix of newer library:
https://github.com/python-escpos/python-escpos/blob/0a89ee2b8610452f18b521af71b1ab1af7932894/escpos/constants.py#L40
Explanation for command:
http://www.beaglehardware.com/howtoprogramcashdrawer.html

closes odoo/odoo#32079

Signed-off-by: Martin Trigaux (mat) <cc7c5be316e48d137cbb549833b85d91034d799d@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo