[identity] Add list_users request
Merge remote-tracking branch 'upstream/develop' into feature/32
[identity] Add create_user request
[identity] Add update_user request
[identity] Add delete_user request
[identity] Add bug links to create_user and update_user request
Merge remote-tracking branch 'upstream/develop' into feature/32
Follow OpenStack capitalization convention
Change hardcoded 'identity' to service.to_s
Update cassette and remove TODO comment
Change hardcoded tenant_id to use the current tenant in-use for create_user test
Change the link name from 'documentation bug' to 'bug' on update_user request
Merge pull request #47 from alvingarcia/feature/32

[identity] User Operations