no custom config capability for karbor providers

[Mohamed El Gindi]

For karbor role, we currently have only openstack-infra.conf be created and injected by kolla-ansible to karbor container.

openstack-infra.conf cannot be customized by kolla-ansible, we will need to modify file in {{ node_config_directory }} (on controller).

If we want to add other providers, we have to put files in `/etc/karbor/providers.d/` inside karbor-protection container.

Not practical and violates 'all configs on deployment node' strategy adopted for kolla-ansible. Its even more troublesome if we're using a HA.

[Mohamed El Gindi (gindi)]

created review https://review.openstack.org/#/c/634611

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/634611
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=e65f4ec7cd8b1f079e09555e72c02022d305033d
Submitter: Zuul
Branch: master

commit e65f4ec7cd8b1f079e09555e72c02022d305033d
Author: Mohamed El Gindi <email address hidden>
Date: Thu Feb 14 08:52:33 2019 -0800

    Karbor providers managed from deployment node

    Karbor provider configs can be injected/managed from 'node_custom_config' var

    openstack-infra.conf will still be created if no custom providers present

    Closes-Bug #1814464

    Change-Id: I500daae80596cb7b7342fd8d4affa8f901b24a13

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/rocky
Review: https://review.openstack.org/639211

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/639211
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=17dab13f7a97df7f83e28cf7dc6fa092a674fc5a
Submitter: Zuul
Branch: stable/rocky

commit 17dab13f7a97df7f83e28cf7dc6fa092a674fc5a
Author: Mohamed El Gindi <email address hidden>
Date: Thu Feb 14 08:52:33 2019 -0800

    Karbor providers managed from deployment node

    Karbor provider configs can be injected/managed from 'node_custom_config' var

    openstack-infra.conf will still be created if no custom providers present

    Closes-Bug #1814464

    Change-Id: I500daae80596cb7b7342fd8d4affa8f901b24a13
    (cherry picked from commit e65f4ec7cd8b1f079e09555e72c02022d305033d)