hg: jdk7/tl/jdk: 6962815: support enable and disable of the servicetag's system registry for testing purpose

[mandy.chung at oracle.com]

Changeset: fe7271b4aeea
Author:    mchung
Date:      2010-06-21 15:02 -0700
URL:       http://hg.openjdk.java.net/jdk7/tl/jdk/rev/fe7271b4aeea

6962815: support enable and disable of the servicetag's system registry for testing purpose
Summary: Allow the system registry to be disabled/enabled at runtime
Reviewed-by: ksrini

! src/share/classes/com/sun/servicetag/Registry.java
! test/com/sun/servicetag/FindServiceTags.java
! test/com/sun/servicetag/JavaServiceTagTest1.java
! test/com/sun/servicetag/SystemRegistryTest.java
! test/com/sun/servicetag/Util.java