hg: jigsaw/jake/jdk: Ability to hide/expose plugin provider. Ability to express functional state. Some tiny fixes.

[jean-francois.denise at oracle.com]

Changeset: 7c5cfe773b7c
Author:    jfdenise
Date:      2015-10-15 18:40 +0200
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/7c5cfe773b7c

Ability to hide/expose plugin provider. Ability to express functional state. Some tiny fixes.
Reviewed-by: jlaskey

! src/jdk.jlink/share/classes/jdk/tools/jlink/TaskHelper.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/ImagePluginConfiguration.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/ProcessingManagerImpl.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/plugins/ImageBuilderProvider.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/plugins/PluginProvider.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/resources/plugins.properties
! test/jdk/jigsaw/tools/jlink/CustomImageBuilderTest.java
! test/jdk/jigsaw/tools/jlink/JLinkTest.java