Code review request, 7145960 sun/security/mscapi/ShortRSAKey1024.sh failing on windows

[Xuelei Fan]

Hi,

Please review the fix of test cases in Windows.

webrev: http://cr.openjdk.java.net./~xuelei/7145960/webrev.00/

Cause of the issue: when keytool cannot generate key pairs in Windows
system, we should exit the testing.

Thanks,
Xuelei