Change patched glance client to fit glance-client code change

In Juno Release , "python-glanceclient" component changes code in the
 dir "glanceclient/common" to replace the old http client implementation
 in favor of a new one based on python-request. This leads to glance
driver image sync failed because of lack of http client attributes and
using the method that has never been in new httpclient.

Change-Id: I06419f792e949fed353277851f9f0f67ba38729d
Closes-Bug: #1349651

(cherry-picked from 20152f86f9)

Change-Id: I9c7f80b9f5849ac5d9d5f4b20d0ddd62074f2bfd

common-powervc/powervc/common/client/patch/glance.py

@@ -92,8 +92,8 @@ def patch_client(service_wrapper, client):
         url = '/v2/images/%s' % image_id
         hdrs = {'Content-Type': 'application/openstack-images-v2.1-json-patch'}
         http_client._request('PATCH', url,
-                                headers=hdrs,
-                                data=image.patch)
+                             headers=hdrs,
+                             data=image.patch)
 
         # NOTE(bcwaldon): calling image.patch doesn't clear the changes, so
         # we need to fetch the image again to get a clean history. This is