hg: openjfx/8u-dev/rt: 8137004: Memory leak caused by Parent#removed not being freed

[chien.yang at oracle.com]

Changeset: 331360f97db4
Author:    Chien Yang <chien.yang at oracle.com>
Date:      2015-10-08 15:23 -0700
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/331360f97db4

8137004: Memory leak caused by Parent#removed not being freed
Reviewed-by: vadim

! modules/graphics/src/main/java/javafx/scene/Parent.java
! modules/graphics/src/test/java/javafx/scene/Parent_structure_sync_Test.java