We want to authorize a tenant to access a private image. We
issue a PUT request to
http://glance.example.com/images/1/members/tenant1.
With no body, this will add the membership to the image, leaving
existing memberships unmodified and defaulting new memberships
to have `can_share` set to `false`. We may also optionally
attach a body of the following form:
{'member':
{'can_share': true}
}
If such a body is provided, both existing and new memberships will have `can_share` set to the provided value (either `true` or `false`). This query will return a 204 ("No Content") status code.
