[api-ref]Fix values of service-status in list-hosts

In "List all hosts for a project", service-status should take
the values of ['available', 'unavailable'], (service-state takes
the value of ['enabled', 'disabled']), and because os-services API
uses service_status which requires returning `enabled` and `disabled`,
we need add a new parameter host_service_status for os-hosts API.

https://docs.openstack.org/api-ref/block-storage/v3/index.html#list-all-hosts-for-a-project
partially-implements: blueprint volume-response-schema-validation

Change-Id: Idde4a63f00862599a13bcfcdadc1d4459f27d3a4

api-ref/source/v2/hosts.inc

@@ -41,7 +41,7 @@ Response Parameters
 
 .. rest_parameters:: parameters.yaml
 
-   - service-status: service_status
+   - service-status: host_service_status
    - service: host_service
    - zone: availability_zone_3
    - service-state: service_state

api-ref/source/v2/parameters.yaml

@@ -687,6 +687,12 @@ host_service:
   in: body
   required: true
   type: string
+host_service_status:
+  description: |
+    The status of the service. One of ``available`` or ``unavailable``.
+  in: body
+  required: true
+  type: string
 id:
   description: |
     The UUID of the volume transfer.
@@ -1539,7 +1545,7 @@ service_state:
   type: string
 service_status:
   description: |
-    The status of the service. One of ``available`` or ``unavailable``.
+    The status of the service. One of ``enabled`` or ``disabled``.
   in: body
   required: true
   type: string

api-ref/source/v3/hosts.inc

@@ -42,7 +42,7 @@ Response Parameters
 .. rest_parameters:: parameters.yaml
 
    - hosts: hosts
-   - service-status: service_status
+   - service-status: host_service_status
    - service: host_service
    - zone: availability_zone_required
    - service-state: service_state

api-ref/source/v3/parameters.yaml

@@ -1355,6 +1355,12 @@ host_service:
   in: body
   required: true
   type: string
+host_service_status:
+  description: |
+    The status of the service. One of ``available`` or ``unavailable``.
+  in: body
+  required: true
+  type: string
 hosts:
   description: |
     A OpenStack Block Storage host.