qa/430 - fix typo in _restore_auto_restart pmlogger
qa/430 - fix typo in _restore_auto_restart pmlogger

pmlogger was spelt wrong - so running qa/430 caused the pmlogger systemd
service config to not be restored, thus affecting the systemd starting
conditions for all tests run after it.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp