hg: kulla/dev/langtools: 8129541: JShell API: make all returned lists unmodifiable

[robert.field at oracle.com]

Changeset: 464df4ed2626
Author:    rfield
Date:      2015-06-25 09:30 -0700
URL:       http://hg.openjdk.java.net/kulla/dev/langtools/rev/464df4ed2626

8129541: JShell API: make all returned lists unmodifiable

! src/jdk.jshell/share/classes/jdk/internal/jshell/impl/JShellImpl.java
! src/jdk.jshell/share/classes/jdk/internal/jshell/impl/SourceCodeAnalysisImpl.java
! test/jdk/jshell/KullaTesting.java