HA: fix injection of certificate in haproxy container
HA: fix injection of certificate in haproxy container

Injection of certificate in pacemaker-managed haproxy [1] is never
exercised due to a bad parsing of container name vs container id.

Closes-Bug: #1922106

[1] Id7308f028f33716be5e3df6699c3f2c12e33e344

Change-Id: Ic6e4264c5ad46bd2589cc907c365af2d42fde63d

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates