Add keypairs_links into resp

v2.35 added keypairs_links into resp param list,
this patch added it to the api-ref

Implements: blueprint api-ref-in-rst

Change-Id: Id62dc61c169c772510b727b7666ae38a555e4247

api-ref/source/os-keypairs.inc

@@ -37,6 +37,7 @@ Response
   - fingerprint: keypair_fingerprint
   - type: keypair_type
   - user_id: keypair_userid
+  - keypairs_links: keypair_links
 
 **Example List Keypairs: JSON response**
 

api-ref/source/parameters.yaml

@@ -2708,6 +2708,16 @@ keypair_fingerprint:
   type: string
   description: |
     The fingerprint for the keypair.
+keypair_links:
+  description: |
+    Links pertaining to keypair. See `API Guide / Links and
+    References
+    <http://developer.openstack.org/api-guide/compute/links_and_references.html>`_
+    for more info.
+  in: body
+  type: array
+  required: false
+  min_version: 2.35
 keypair_name:
   in: body
   required: true