Microversion 2.35 adds keypairs pagination support

After this microversion Nova API allows to get several keypairs
with the help of new optional parameters 'limit' and 'marker'
which were added to GET /os-keypairs request.

Partial-Bug: #1599904

Implements blueprint: keypairs-pagination

Change-Id: Idd3757f5be90ec4af1bd1a7ca3f9c20319dbfd33

nova/api/openstack/api_version_request.py

@@ -87,6 +87,7 @@ REST_API_VERSION_HISTORY = """REST API Version History:
              os-Migratelive Action does not throw badRequest in case of
              pre-checks failure. Verification result is available over
              instance-actions.
+    * 2.35 - Adds keypairs pagination support.
 """
 
 # The minimum and maximum versions of the API supported
@@ -95,7 +96,7 @@ REST_API_VERSION_HISTORY = """REST API Version History:
 # Note(cyeoh): This only applies for the v2.1 API once microversions
 # support is fully merged. It does not affect the V2 API.
 _MIN_API_VERSION = "2.1"
-_MAX_API_VERSION = "2.34"
+_MAX_API_VERSION = "2.35"
 DEFAULT_API_VERSION = _MIN_API_VERSION