Add response examples to OS-OAUTH1 api documentation

Add response examples to API documentation for following API
/v3/users/{user_id}/OS-OAUTH1/access_tokens/{access_token_id}/roles
/v3/users/{user_id}/OS-OAUTH1/access_tokens/{access_token_id}/roles/{role_id}

Change-Id: I380348d149fd917d636ef4e0e6589fffdedee2ab
Closes-Bug: #1686015

api-ref/source/v3-ext/oauth.inc

@@ -409,6 +409,12 @@ Request
    - user_id: user_id_path
    - access_token_id: access_token_id_path
 
+Response Example
+----------------
+
+.. literalinclude:: ./samples/OS-OAUTH1/access-token-roles-list-response.json
+   :language: javascript
+
 
 Show role details for an access token
 =====================================
@@ -432,6 +438,12 @@ Request
    - role_id: role_id_path
    - access_token_id: access_token_id_path
 
+Response Example
+----------------
+
+.. literalinclude:: ./samples/OS-OAUTH1/access-token-role-show-response.json
+   :language: javascript
+
 
 Authenticate with Identity API
 ==============================

api-ref/source/v3-ext/samples/OS-OAUTH1/access-token-role-show-response.json

@@ -0,0 +1,10 @@
+{
+    "role": {
+        "id": "5ad150",
+        "domain_id": "7cf37b",
+        "links": {
+            "self": "http://example.com/identity/v3/roles/5ad150"
+        },
+        "name": "admin"
+    }
+}

api-ref/source/v3-ext/samples/OS-OAUTH1/access-token-roles-list-response.json

@@ -0,0 +1,25 @@
+{
+    "roles": [
+        {
+            "id": "5ad150",
+            "domain_id": "7cf37b",
+            "links": {
+                "self": "http://example.com/identity/v3/roles/5ad150"
+            },
+            "name": "admin"
+        },
+        {
+            "id": "a62eb6",
+            "domain_id": "7cf37b",
+            "links": {
+                "self": "http://example.com/identity/v3/roles/a62eb6"
+            },
+            "name": "Member"
+        }
+    ],
+    "links": {
+        "next": null,
+        "previous": null,
+        "self": "http://example.com/identity/v3/users/ce9e07/OS-OAUTH1/access_tokens/6be26a/roles"
+    }
+}