[8] code review for 7084026: sun/security/mscapi/KeytoolChangeAlias.sh fails consistently on win2003

[Vincent Ryan]

Please review the following fix that adds cleanup code to a failing testcase:

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7084026
Webrev: http://cr.openjdk.java.net/~vinnie/7084026/webrev.00/

Thanks.