Fix broken api urls in TypesClient

Three api urls are broken in TypesClient, this is to fix them.

Change-Id: I38b41f4c5c954300abf4225d2d54132aebb22af5
diff --git a/tempest/lib/services/volume/v2/types_client.py b/tempest/lib/services/volume/v2/types_client.py
index 5d30615..af4fd8c 100644
--- a/tempest/lib/services/volume/v2/types_client.py
+++ b/tempest/lib/services/volume/v2/types_client.py
@@ -41,7 +41,7 @@
 
         For a full list of available parameters, please refer to the official
         API reference:
-        http://developer.openstack.org/api-ref/block-storage/v2/#list-volume-types
+        https://developer.openstack.org/api-ref/block-storage/v2/#list-all-volume-types-for-v2
         """
         url = 'types'
         if params:
@@ -57,7 +57,7 @@
 
         For a full list of available parameters, please refer to the official
         API reference:
-        http://developer.openstack.org/api-ref/block-storage/v2/#show-volume-type-details
+        https://developer.openstack.org/api-ref/block-storage/v2/#show-volume-type-details-for-v2
         """
         url = "types/%s" % volume_type_id
         resp, body = self.get(url)
@@ -70,7 +70,7 @@
 
         For a full list of available parameters, please refer to the official
         API reference:
-        http://developer.openstack.org/api-ref/block-storage/v2/#create-volume-type
+        https://developer.openstack.org/api-ref/block-storage/v2/#create-volume-type-for-v2
         """
         post_body = json.dumps({'volume_type': kwargs})
         resp, body = self.post('types', post_body)