Previously users created by the Users context set by default the
endpoint_type to consts.EndpointType.PUBLIC, but if
const.EndpointType.INTERNAL was specified only it'd have applied
to admin and existing users. This patch sets the endpoint_type to
default to the admin's endpoint_type.
Change-Id: I0618abbf42ecfc5cdaf9a3807b1002408bca9325
Closes-Bug: 1424082