pylint: Lint in single process mode

There are several known problems with multiprocess mode.
For example, pylint-dev/pylint#3232.

In other words the lint result depends on the number of jobs.
The most correct report is expected for single process.

Fixes: https://pagure.io/freeipa/issue/9278
Signed-off-by: Stanislav Levin <slev@altlinux.org>

pylintrc

@@ -8,9 +8,6 @@ persistent=no
 #        DuplicateSectionError for the IPA section
 #load-plugins=pylint_plugins
 
-# Use multiple processes to speed up Pylint.
-jobs=0
-
 # A list of packages with safe C extensions to load
 extension-pkg-whitelist=
     _ldap,