hg: jdk9/dev/langtools: 8163989: Clarify ModuleElement spec

[joe.darcy at oracle.com]

Changeset: 51b4cd2af28e
Author:    darcy
Date:      2017-06-19 15:06 -0700
URL:       http://hg.openjdk.java.net/jdk9/dev/langtools/rev/51b4cd2af28e

8163989: Clarify ModuleElement spec
Reviewed-by: abuckley, jjg

! src/java.compiler/share/classes/javax/lang/model/element/ModuleElement.java
! src/java.compiler/share/classes/javax/lang/model/element/PackageElement.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java
! test/tools/javac/modules/EdgeCases.java
+ test/tools/javac/processing/model/element/TestModuleElementNames.java
! test/tools/javac/processing/model/element/TestPackageElement.java