[9] request for review 8051972: sun/security/pkcs11/ec/ReadCertificates.java fails intermittently

[Vincent Ryan]

Please review this simple fix to eliminate an intermittent test failure. 

Bug: https://bugs.openjdk.java.net/browse/JDK-8051972
Webrev: http://cr.openjdk.java.net/~vinnie/8051972/webrev.00/

The fix detects if a self-signed cert has inadvertently been selected for an
invalid-signature test and ignores the resulting false positive.

Thanks.