Simplify host entries generation

This removes a resource and the the unnecessary yaql function.
Also replaces json data types with lists to reduce memory
footprint.

Change-Id: I04a6114ca3d2703ca2891d6807d49b78ffee0f97
Related-Bug: #1886203
(cherry picked from commit d573f4e878)

overcloud.j2.yaml

@@ -402,9 +402,8 @@ resources:
   VipHosts:
     type: OS::Heat::Value
     properties:
-      type: json
+      type: comma_delimited_list
       value:
-        entries:
         - str_replace:
             template: IP  HOST
             params:
@@ -794,31 +793,22 @@ resources:
             for_each:
               hostname: {get_param: DeploymentServerBlacklist}
 
-  # Single value comma delimited lists may be stored in strings
-  # that fails lists concat. Make them always lists (nested are OK)
-  HostsValue:
-    type: OS::Heat::Value
-    properties:
-      type: json
-      value:
-        entries:
-            - - {get_param: UndercloudHostsEntries}
-            - - if:
-                - add_vips_to_etc_hosts
-                - {get_attr: [VipHosts, value, entries]}
-                - []
-{%- for role in roles %}
-            - {get_attr: [{{role.name}}, hosts_entry, entries]}
-{%- endfor %}
-            - - {get_param: ExtraHostFileEntries}
-
   HostsEntryValue:
     type: OS::Heat::Value
     properties:
+      type: comma_delimited_list
       value:
-        yaql:
+        list_concat_unique:
-          expression: coalesce($.data, []).where($ != null).where($ != []).flatten().distinct()
+          list_concat:
-          data: {get_attr: [HostsValue, value, entries]}
+            - - {get_param: UndercloudHostsEntries}
+            - - if:
+                - add_vips_to_etc_hosts
+                - {get_attr: [VipHosts, value]}
+                - []
+{%- for role in roles %}
+            - {get_attr: [{{role.name}}, hosts_entry]}
+{%- endfor %}
+            - - {get_param: ExtraHostFileEntries}
 
   CloudNames:
     type: OS::Heat::Value
@@ -1130,7 +1120,7 @@ resources:
       VipHostsEntries:
         if:
           - add_vips_to_etc_hosts
-          - {get_attr: [VipHosts, value, entries]}
+          - {get_attr: [VipHosts, value]}
           - []
       KeystoneResourcesConfigs:
         map_merge:
@@ -1167,7 +1157,7 @@ outputs:
     value:
       list_concat_unique:
         - {get_attr: [HostsEntryValue, value]}
-        - {get_attr: [VipHosts, value, entries]}
+        - {get_attr: [VipHosts, value]}
   EnabledServices:
     description: The services enabled on each role
     value:

puppet/role.role.j2.yaml

@@ -641,7 +641,6 @@ outputs:
             HOSTNAME: {get_attr:[{{server_resource_name}}, name]}
   hosts_entry:
     value:
-      entries:
       - str_replace:
           template: PRIMARYIP PRIMARYHOST.DOMAIN PRIMARYHOST
           params: