hg: jigsaw/jake/jdk: Address review comments

[alan.bateman at oracle.com]

Changeset: 2182c183a9ad
Author:    alanb
Date:      2017-04-06 13:21 +0100
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/2182c183a9ad

Address review comments

! src/java.base/share/classes/java/util/ServiceLoader.java
! src/java.base/share/classes/sun/launcher/LauncherHelper.java
! src/java.instrument/share/classes/sun/instrument/InstrumentationImpl.java
! test/tools/launcher/modules/listmods/ListModsTest.java