hg: openjfx/sandbox-9-jake/rt: Change JDK9_HOME to JIGSAW_HOME (and do the same for related gradle properties)

[kevin.rushforth at oracle.com]

Changeset: 64dd9becae2f
Author:    kcr
Date:      2016-03-15 09:29 -0700
URL:       http://hg.openjdk.java.net/openjfx/sandbox-9-jake/rt/rev/64dd9becae2f

Change JDK9_HOME to JIGSAW_HOME (and do the same for related gradle properties)

! build.gradle
! buildSrc/src/main/java/workaround/GradleJUnitWorker.java
! tests/system/src/test/java/test/util/Util.java