RFR: JDK-8027612, , java/io/File/MaxPathLength.java fails intermittently in the clean-up stage

[Dan Xu]

Hi All,

Please review a simple test fix. In the clean-up stage of 
MaxPathLength.java on windows platform, the delete operation may be 
interfered by anti-virus software or some Windows services, which will 
lead to the failure of recursive directory delete operations. In the 
change, the test will try its best to clean up testing folders. If it 
fails, it will just ignore that, continue the testing process, and let 
jtreg to handle the clean-up later. Thanks!

Bug: https://bugs.openjdk.java.net/browse/JDK-8027612
Webrev: http://cr.openjdk.java.net/~dxu/8027612/webrev/

-Dan