... to suppress the following warning from keystonemiddleware.
Configuring www_authenticate_uri to point to the public identity
endpoint is required; clients may not be able to authenticate against
an admin endpoint
Change-Id: I3f1a6b2c5d2e7d3dce6fd1ee6694f8146ae06437
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>