Barbican policy contains target attributes which need to be updated in request context
like "target.secret.project.id". Otherwise certificate menu throws permission denied errors.
Also we need to set "target.secret.read" and "target.secret.read_project_access"
but i did not find a way how to set them.
Change-Id: I51631d0be023fc091b32aaeb71145c2893454bba