Correct normal response codes in trust documentation
Correct normal response codes in trust documentation

20X http status codes don't represent errors. Most of the time they were
grouped in to the Error response codes list. This commit moves them into their
own Normal response codes list.

Change-Id: I087502094db29a7101c9ceca08ad48fb812f6005

ilay09/keystone,rajalokan/keystone,openstack/keystone,mahak/keystone,mahak/keystone,rajalokan/keystone,cernops/keystone,mahak/keystone,openstack/keystone,ilay09/keystone,cernops/keystone,ilay09/keystone,openstack/keystone,rajalokan/keystone