api-ref: Correct response body type for show host details

Currently [0] claims that "total_volume_gb" in the response body
is of type int -- but it is actually a string, going off the example
response body as well as the API code, which clearly casts the
value to a str() [1].

[0] https://developer.openstack.org/api-ref/block-storage/v3/index.html?expanded=show-host-details-for-a-project-detail#show-host-details-for-a-project
[1] 95d6d49b01/cinder/api/contrib/hosts.py (L169)

Change-Id: I36486724cc30389d371ec0b18b9b7f96883d193c

api-ref/source/v2/hosts.inc

@@ -92,9 +92,9 @@ Response
 
 .. rest_parameters:: parameters.yaml
 
-  - volume_count: total_count
-  - total_volume_gb: totalGigabytesUsed
-  - total_snapshot_gb: totalSnapshotsUsed
+  - volume_count: total_count_str
+  - total_volume_gb: totalGigabytesUsedStr
+  - total_snapshot_gb: totalSnapshotsUsedStr
   - project: project_id_2
   - host: host_name_1
   - snapshot_count: totalSnapshotsUsed

api-ref/source/v2/parameters.yaml

@@ -1649,6 +1649,12 @@ total_count:
   in: body
   required: true
   type: integer
+total_count_str:
+  description: |
+    Total number of volumes.
+  in: body
+  required: true
+  type: string
 totalBackupGigabytesUsed:
   description: |
     The total number of backups gibibytes (GiB) used.
@@ -1667,12 +1673,24 @@ totalGigabytesUsed:
   in: body
   required: true
   type: integer
+totalGigabytesUsedStr:
+  description: |
+    The total number of gibibytes (GiB) used.
+  in: body
+  required: true
+  type: string
 totalSnapshotsUsed:
   description: |
     The total number of snapshots used.
   in: body
   required: true
   type: integer
+totalSnapshotsUsedStr:
+  description: |
+    The total number of snapshots used.
+  in: body
+  required: true
+  type: string
 totalVolumesUsed:
   description: |
     The total number of volumes used.

api-ref/source/v3/hosts.inc

@@ -95,7 +95,7 @@ Response
 
   - host: host
   - volume_count: total_count
-  - total_volume_gb: totalGigabytesUsed
+  - total_volume_gb: totalGigabytesUsedStr
   - total_snapshot_gb: totalSnapGigabytesUsed
   - project: project_id_2
   - host: host_name_1

api-ref/source/v3/parameters.yaml

@@ -2823,6 +2823,12 @@ totalGigabytesUsed:
   in: body
   required: true
   type: integer
+totalGigabytesUsedStr:
+  description: |
+    The total number of gibibytes (GiB) used.
+  in: body
+  required: true
+  type: string
 totalSnapGigabytesUsed:
   description: |
     The total number of gibibytes (GiB) used by snapshots.