meta-security: subtree update:7831969f8c..547f552c85

Armin Kuster (3):
      suricata: update to 4.1.8
      packagegroup-core-security-ptest: update fail2ban ptest pkg name
      isafw.bbclass: typo in layer name

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I1a4a51839d53d75ca7e45ea7b1fdb46a62fe33b9