Security update for corosync (important)

This update for corosync fixes the following issues:

• CVE-2018-1084: Integer overflow in totemcrypto:authenticate_nss_2_3()
  could lead to command execution (bsc#1089346)
• Providing an empty uid or gid results in coroparse adding uid 0.
  (bsc#1066585)
• Fix a problem with configuration file incompatibilities that was causing
  corosync to not work after upgrading from SLE-11-SP4-HA to SLE-12/15-HA.
  (bsc#1083561)

This update was imported from the SUSE:SLE-12-SP3:Update update project.