veyron/services/store/stored: Let stored use the default identity.
veyron/services/store/stored: Let stored use the default identity.

This is still probably not the way we set up default ACLs long term, but at
least demos can run for now with the default setup.

Change-Id: I6c60b7e8bf35b0c31f2db52e29496476c2fb2c50

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref