Add some space before cutting paper
Add some space before cutting paper

This is a common issue with some printers, where you need to feed the
paper a little bit before cutting the paper.

Fixes: https://tree.taiga.io/project/stoq/task/1903
Change-Id: Ic8c624cdfd84a0f1f0b701b02527806cd4f22602

stoq/stoqdrivers,stoq/stoqdrivers