Use multiple processes to speed up pylint. Specifying -j0 will
auto-detect the number of processors available to use.
On AMD Ryzen 7 3700X this significantly reduces the exec time:
$ time python -m pylint -j1 ... pySim *.py
real 0m12.409s
user 0m12.149s
sys 0m0.136s
$ time python -m pylint -j0 ... pySim *.py
real 0m5.541s
user 0m58.496s
sys 0m1.213s
Change-Id: I76d1696c27ddcab358526f807c4a0a7f0d4c85d4
b3ea021b32