api-ref: total/free_capacity should be with postfix _gb

https://developer.openstack.org/api-ref/block-storage/v3/index.html#list-all-back-end-storage-pools
free_capacity and total_capacity in "List all back-end storage pools"
should be free_capacity_gb and total_capacity_gb

Change-Id: Ic0690d12147fa63b903f3442eccde88c1d501711

api-ref/source/v2/os-vol-pool-v2.inc

@@ -37,10 +37,10 @@ Response Parameters
    - updated: updated
    - QoS_support: QoS_support
    - name: name_16
-   - total_capacity: total_capacity
+   - total_capacity_gb: total_capacity
    - volume_backend_name: volume_backend_name
    - capabilities: capabilities
-   - free_capacity: free_capacity
+   - free_capacity_gb: free_capacity
    - driver_version: driver_version
    - reserved_percentage: reserved_percentage
    - storage_protocol: storage_protocol

api-ref/source/v2/parameters.yaml

@@ -342,7 +342,7 @@ capabilities:
   description: |
     The capabilities for the back end.  The value is
     either ``null`` or a string value that indicates the capabilities
-    for each pool. For example, ``total_capacity`` or ``QoS_support``.
+    for each pool. For example, ``total_capacity_gb`` or ``QoS_support``.
   in: body
   required: true
   type: object

api-ref/source/v2/samples/pools-list-detailed-response.json

@@ -4,8 +4,8 @@
             "name": "pool1",
             "capabilities": {
                 "updated": "2014-10-28T00:00:00-00:00",
-                "total_capacity": 1024,
-                "free_capacity": 100,
+                "total_capacity_gb": 1024,
+                "free_capacity_gb": 100,
                 "volume_backend_name": "pool1",
                 "reserved_percentage": 0,
                 "driver_version": "1.0.0",
@@ -17,8 +17,8 @@
             "name": "pool2",
             "capabilities": {
                 "updated": "2014-10-28T00:00:00-00:00",
-                "total_capacity": 512,
-                "free_capacity": 200,
+                "total_capacity_gb": 512,
+                "free_capacity_gb": 200,
                 "volume_backend_name": "pool2",
                 "reserved_percentage": 0,
                 "driver_version": "1.0.1",

api-ref/source/v3/os-vol-pool-v3.inc

@@ -44,10 +44,10 @@ Response Parameters
    - updated: updated
    - QoS_support: QoS_support
    - name: name_20
-   - total_capacity: total_capacity
+   - total_capacity_gb: total_capacity
    - volume_backend_name: volume_backend_name
    - capabilities: capabilities
-   - free_capacity: free_capacity
+   - free_capacity_gb: free_capacity
    - driver_version: driver_version
    - reserved_percentage: reserved_percentage
    - storage_protocol: storage_protocol

api-ref/source/v3/parameters.yaml

@@ -634,7 +634,7 @@ capabilities:
   description: |
     The capabilities for the back end.  The value is
     either ``null`` or a string value that indicates the capabilities
-    for each pool. For example, ``total_capacity`` or ``QoS_support``.
+    for each pool. For example, ``total_capacity_gb`` or ``QoS_support``.
   in: body
   required: true
   type: object

api-ref/source/v3/samples/pools-list-detailed-response.json

@@ -4,8 +4,8 @@
             "name": "pool1",
             "capabilities": {
                 "updated": "2014-10-28T00:00:00-00:00",
-                "total_capacity": 1024,
-                "free_capacity": 100,
+                "total_capacity_gb": 1024,
+                "free_capacity_gb": 100,
                 "volume_backend_name": "pool1",
                 "reserved_percentage": 0,
                 "driver_version": "1.0.0",
@@ -17,8 +17,8 @@
             "name": "pool2",
             "capabilities": {
                 "updated": "2014-10-28T00:00:00-00:00",
-                "total_capacity": 512,
-                "free_capacity": 200,
+                "total_capacity_gb": 512,
+                "free_capacity_gb": 200,
                 "volume_backend_name": "pool2",
                 "reserved_percentage": 0,
                 "driver_version": "1.0.1",