rm invalid args when updating quotas with nova api

  1. Remove invalid args "volumes" and "gigabytes" while calling
     nova.tenant_quota_update in UpdateProject and CreateProject
     workflows.

  2. Update related test cases.

Fixes bug 1155876 and fixes bug 1156198.

Change-Id: I3ee9e3b6b4f19452e42129f750bc4bbe0727e343
Merge "rm invalid args when updating quotas with nova api"