[8u20] RFR Backport of JDK-8033150: invokestatic: IncompatibleClassChangeError trying to invoke static method from a parent in presence of conflicting defaults

[Lois Foltan]

Please approve the backport of JDK-8033150 to jdk8u.  The changeset 
applied cleanly.

The bug:
https://bugs.openjdk.java.net/browse/JDK-8033150

The webrev:
http://cr.openjdk.java.net/~lfoltan/bug_jdk8033150_8u/

The jdk9 changeset:
http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/e04d3232b9c9

Thanks,
Lois