[7u40] Request for phase 2 approval for CR 8012156 - tools/javac/file/zip/T6865530.java fails for win32/64

[Chris Hegarty]

This is a fix for a regression from a recent change. URLClassLoader may 
hold an open stream to a resource in some circumstances. The solution is 
to close the stream in these circumstances.

The changes for 7u are identical to JDK8.

JDK8 changeset:
   http://hg.openjdk.java.net/jdk8/tl/jdk/rev/a4ea4234facf

All relevant regression tests have been run.

-Chris.