Records: member reference in referencable flag is useless

[alexanderpann]

Testcase: http://127.0.0.1:63320/node?ref=r%3Afcb91210-c6db-4de0-81c0-ca99e48fd25a%28test.in.expr.os.records%40tests%29%2F7782108600711770070 The ref expression always refers to the full record literal. We should drop this reference.