Fix image-import call

Change the request body sent from the client to be the format
that the API expects for the image-import call.

Depends-On:  I08783e28719e63b5a4b2115b8fce135e55be460a
Change-Id: I5e34d772d561306c6f103c859740658a825dd189
Closes-bug: #1711259

glanceclient/v2/images.py

@@ -255,7 +255,7 @@ class Controller(object):
     def image_import(self, image_id, method='glance-direct'):
         """Import Image via method."""
         url = '/v2/images/%s/import' % image_id
-        data = {'import_method': method}
+        data = {'method': {'name': method}}
         resp, body = self.http_client.post(url, data=data)
         return body, resp