Remove unused assertions from test_v3.py
Remove unused assertions from test_v3.py

These assertions are not used anywhere in keystone's tests. The
assertion for service providers was added but never used:

  I62ec9619d8b187cda80100e383d40b158550b71f

The token assertion was no longer used when we removed the v2.0
token API as noted in the commit message of:

  I4c3e35f3565b4b60ae4d00cc2490bd04aba1a800

Change-Id: If28273c88518df0ba6b75a98f13f123bee574fb5

mahak/keystone,openstack/keystone,mahak/keystone,openstack/keystone,openstack/keystone,mahak/keystone