Public certs and pubkeys with an auth_id are treated as private (See #291)

Code to test for an auth_id for certs and pubkeys was removed.
See: PKCS#15 section 4.1.3 Access methods

This is conseritive change and all objects could be treaded the same.
Merge pull request #315 from dengert/privateObjects

Public certs and pubkeys with an auth_id are treated as private (See #291)