hg: nashorn/jdk8/nashorn: 8015969: Needs to enforce and document that global "context" and "engine" can't be modified when running via jsr223

[sundararajan.athijegannathan at oracle.com]

Changeset: 26a345c26e62
Author:    sundar
Date:      2013-06-25 17:31 +0530
URL:       http://hg.openjdk.java.net/nashorn/jdk8/nashorn/rev/26a345c26e62

8015969: Needs to enforce and document that global "context" and "engine" can't be modified when running via jsr223
Reviewed-by: hannesw, jlaskey

! docs/JavaScriptingProgrammersGuide.html
! src/jdk/nashorn/api/scripting/NashornScriptEngine.java
! src/jdk/nashorn/internal/runtime/AccessorProperty.java
! src/jdk/nashorn/internal/runtime/Property.java
! src/jdk/nashorn/internal/runtime/UserAccessorProperty.java
+ test/script/basic/JDK-8015969.js