05e696c62d02ef64180d611413ae10f0418c002a

An error (e.g a typo) in a custom tripleo-heat-templates environment file could lead to an invalid match block in /etc/ssh/sshd_config. SSH fails-safe and refuses all logins in this case. This change validates the migration_ssh_localaddrs parameter is an array of IP addresses and removes and duplicate entries. Change-Id: Ibcf144d960fe52f0eab0d5015bd30cf7c1e37e25 Closes-Bug: #1688308
Description