Revert "Use the appropriate name for horizon ssl ca parameter"

Because the dependent patch[1] does not present in stable/victoria
we should not merge this patch until stable/victoria release is created
for TripleO projects.
This revert will be reverted once stable/victoria branch is created.

This reverts commit d3b099f.
Resolved conflict caused by the subsequemtn commit[2]

[1] https://review.opendev.org/#/c/758041/
[2] 132c0b1

Conflicts:
	deployment/horizon/horizon-container-puppet.yaml

Related-Bug: #1901626
Change-Id: I1cc635715084789602fc40084ba5df4d5790199c

deployment/horizon/horizon-container-puppet.yaml

@@ -230,7 +230,7 @@ outputs:
         -
           if:
           - internal_tls_enabled
-          - horizon::ssl_ca: {get_param: InternalTLSCAFile}
+          - horizon::horizon_ca: {get_param: InternalTLSCAFile}
             horizon::ssl_verify_client: true
           - {}
         -