Kolla ansible now provides the ability to change the SELinux mode, and does so
by default. The default mode is 'permissive', whereas kayobe sets it to
'disabled' in the disable-selinux role. This results in a flip-flop effect as
the two fight, and worse - kayobe will reboot the system to apply the change
on subsequent runs of 'kayobe <seed|controller> host configure'.
This change configures the selinux mode for kolla ansible to be 'disabled' to
avoid this issue.
TrivialFix
Change-Id: I53e1d431ecd5ddb602f41b197ac482c3ed89d1d9
7451f55080