hg: openjfx/8/graphics/rt: [TEST-ONLY] disable three more cancelHandler tests since they also fail intermittently

[hang.vo at oracle.com]

Changeset: d530170f8968
Author:    kcr
Date:      2013-06-15 06:58 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/d530170f8968

[TEST-ONLY] disable three more cancelHandler tests since they also fail intermittently

! javafx-concurrent/test/javafx/concurrent/ServiceLifecycleTest.java