8245867: Logger/bundleLeak/BundleTest.java fails due to "OutOfMemoryError: Java heap space"

[Daniel Fuchs]

Hi,

Please find an almost trivial fix for:

8245867: Logger/bundleLeak/BundleTest.java fails due
          to "OutOfMemoryError: Java heap space"
https://bugs.openjdk.java.net/browse/JDK-8245867

webrev:
http://cr.openjdk.java.net/~dfuchs/webrev_8245867/webrev.00/

My new test for JDK-8239013 has been observed failing
intermittently in OutOfMemory. The test needs to trigger
the clearing of SoftReferences, and does so by eating
up heap memory in order to trigger a GC that will
clear them.
The issue is that the test didn't release the memory
when it no longer needed it, which caused trouble for
the test harness when it tried to clean up after the
test.

The fix is to use SoftReference to retain the eaten-up
memory (instead of strong references) so that it can
be reclaimed at the time the full GC that clear soft
references is triggered, and also to release the heap
memory as soon as it is no longer needed.

best regards,

-- daniel