Keystone v3 has changed the name of tenants to projects which means that
OS_TENANT_NAME is meaningless in a cloud where v3 is the default
authentication version. As such, if a user does not have OS_TENANT_NAME
enabled, cinderclient will not work even though it has checks for v3
immediately below this check (and the same check replicated further
below that). Removing this allows cinderclient to work with Keystone v3
without setting OS_TENANT_NAME unnecessarily.
Further, the check for project information was incorrectly referring to
project_domain_name and project_domain_id instead of
os_project_domain_name and os_project_domain_id.
Closes-bug: 1472636
Change-Id: Ifabb4a2aec070c00349e794364a71394feea99f1
8afc06c562