Use multiple processes to speed up pylint

0 will auto-detect the number of processors available to use.
version 1.6.5 (Debian 9.5) hangs for some reason in multi-process mode.

<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot URI_location="LOCAL://">
  <TargetType/>
  <Libraries Enable_Native_Library="true"/>
</BeremizRoot>