Change hoirzon SSL monitor to HTTP_443
Change hoirzon SSL monitor to HTTP_443

Also changes backend port to use port 80.
This is kind of a strange one. Due to the new behavior
introduced in https://review.openstack.org/#/c/277199/
and https://review.openstack.org/#/c/288786, horizon listens
on port 443 and 80 on http. The LB monitor needs to be changed
accordingly. Curling http://<container-ip>:443 results in a
200 OK now. Curling https//<container-ip>:443 will no longer
work since certs no longer exist on the container

Connects https://github.com/rcbops/rpc-openstack/issues/1632

cloudnull/rpc-openstack,jacobwagner/rpc-openstack,major/rpc-openstack,mancdaz/rpc-openstack,cfarquhar/rpc-openstack,galstrom21/rpc-openstack,hughsaunders/rpc-openstack,robb-romans/rpc-openstack,prometheanfire/rpc-openstack,cfarquhar/rpc-openstack,galstrom21/rpc-openstack,git-harry/rpc-openstack,jacobwagner/rpc-openstack,prometheanfire/rpc-openstack,BjoernT/rpc-openstack,BjoernT/rpc-openstack,cloudnull/rpc-openstack,mancdaz/rpc-openstack,git-harry/rpc-openstack,robb-romans/rpc-openstack,shannonmitchell/rpc-openstack,shannonmitchell/rpc-openstack,major/rpc-openstack,rcbops/rpc-openstack,rcbops/rpc-openstack,hughsaunders/rpc-openstack