Remote HA partner link is not displayed in docker demo

Steps to reproduce:

rake docker_up cache=false
Open UI
Add two machines: agent-kea-ha1 and agent-kea-ha2
Click on one of the Kea apps added

The HA status shows two boxes, one for local server, one for remote. In the title of the remote partner's box there should be a link to the partner, but it is not shown.

The reason for it seems to be that Storks ends up creating two HA services for the two apps, rather than one. I suspect that the reason for it is that their configs slightly differ. Strictly speaking they differ by the following url:

"url": "http://172.20.0.102:8002/"

"url": "http://172.20.0.102:8002"

We could make the URLs comparison slightly less fragile but I think it should come in some other issue that looks at more aspects of HA configuration matching than URLs. Here, we should really just make it work with the minimal effort given the time constraints.