8132926: PKIXParameters built with public key form of TrustAnchor causes NPE during cert path building/validation
Summary: Fix cases where non-certificate issuer information may be passed into the OCSPResponse.verify method, thereby causing NPEs to be thrown.
Reviewed-by: xuelei
6543126: Level.known can leak memory
Summary: Custom level instances will now be released when their defining class loader is no longer referenced.
Reviewed-by: plevart, mchung, chegar