Route Advertisement, also known as 'ra', needs to be disabled during
node installation or ostree pull failures, although rare, can happen.
This update ensures that IPV6 autoconf, accept_ra and accept_redirect
settings are disabled on all interfaces during install.
Test Plan:
PASS: Verify build and install ISO
PASS: Verify controller-0 usb install
PASS: Verify controller-0 network install
PASS: Verify system node network install
PASS: Verify redfish subcloud install
PASS: In all cases above verify update logging
... /var/log/lat/kickstart.log
... /var/log/lat/miniboot.log
Closes-Bug: 2089298
Change-Id: Ia9978d3df5a4c96d9615fe57701e78721e0c62c5
Signed-off-by: Eric MacDonald <eric.macdonald@windriver.com>