This commit adds the ability to enable automatic package upgrades via
openstack-ansible-security. To enable, add the following variable to
your /etc/openstack_deploy/user_variables.yml file:
unattended_upgrades_enabled: true
To have the unattended upgrades system send e-mail notifications
when packages need updating or errors are encountered, add the
following to user_variables.yml:
unattended_upgrades_notifications: true
As many organisations do not subscribe to auto updates, this
functionality will remain disabled by default.
Note that the first iteration of this change does not allow deep
customisation of unatteded-upgrades. This means that as it stands
only trusty-security (or $distro-security) updates will be applied.
Closes-Bug: #1568075
Change-Id: I22ba1a02acfbe2befb601af6a4099d53d988d856
d1ca8dbaa7