RFR: 8167063: spurious message "A JNI error has occurred" if start-class cannot be initialized

[Ramanand Patil]

Hi all,
Please review the following bug fix:
Bug: https://bugs.openjdk.java.net/browse/JDK-8167063
Webrev: http://cr.openjdk.java.net/~rpatil/8167063/webrev.00/

Handled the SecurityException and LinkageError which can be thrown from Class.forName(...) method used in LauncherHelper.java and added corresponding error messages to launcher.properties.
Though the reported bug is because of the LinkageError, Security exception is also handled to be safe from calling Class.forName method.

Regards,
Ramanand.