If user specifies registry a full image name is constructed by
concatenation of the registry, namespace and image. Currently
concatenation does not include '/' if registry is non-empty but
it should. If registry is empty '/' is not required.
This fix covers both use cases with help of Ansible filter.

Change-Id: I0588dd0da55d777e6caa7eb47d51b2435d38d5e0
Closes-Bug: #1479013

Adds the needed ansible bits to support keepalived

Closes-Bug: #1479934
Change-Id: Iace29b23a0e923b1f5dc9a4f5bc0f88afce3ae62
Partially-Implements: blueprint ansible-service

This commit consists HAProxy ansible bits including config generation,
container deployment and hot reloads.

Closes-Bug: #1477915
Co-Authored-By: Sam Yaple <sam@yaple.net>
Change-Id: Ie93fa68fdb6b2885889c992ff1267d38b68e0cbc
Partially-implements: blueprint ansible-service