Update Keystone API ports in Drydock chart

This change modifies the internal Keystone API port in the
Drydock chart from 80 to 5000 and removes the default admin port
to match the Keystone chart provided by OpenStack-Helm.

Change-Id: I46fa68ffad5015a040b0022776459208be511881

charts/drydock/values.yaml

@@ -180,8 +180,8 @@ endpoints:
         user_domain_name: default
         project_domain_name: default
     hosts:
-      default: keystone-api
-      public: keystone
+      default: keystone
+      internal: keystone-api
     host_fqdn_override:
       default: null
     path:
@@ -189,10 +189,9 @@ endpoints:
     scheme:
       default: http
     port:
-      admin:
-        default: 35357
       api:
         default: 80
+        internal: 5000
   physicalprovisioner:
     name: drydock
     hosts: