RFR: JDK-8210337: runtime/NMT/VirtualAllocTestType.java failed on RuntimeException missing from stdout/stderr

[Gary Adams]

Solaris debug builds are failing tests that use the attach interface.
An IOException is reported when the java_pid file is not opened.

It appears that the attempt to attach is taking place too quickly.
This workaround will allow the open operation to be retried
after a short pause.

   Webrev: http://cr.openjdk.java.net/~gadams/8210337/webrev/
   Issue: https://bugs.openjdk.java.net/browse/JDK-8210337

Testing is in progress.