hg: jdk/jdk: 8211694: JShell: Redeclared variable should be reset

[robert.field at oracle.com]

Changeset: 003c062e16ea
Author:    rfield
Date:      2018-10-24 21:17 -0700
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/003c062e16ea

8211694: JShell: Redeclared variable should be reset
Reviewed-by: sundar

! src/jdk.jshell/share/classes/jdk/jshell/Eval.java
! src/jdk.jshell/share/classes/jdk/jshell/Snippet.java
! test/langtools/jdk/jshell/SnippetTest.java
! test/langtools/jdk/jshell/ToolBasicTest.java
! test/langtools/jdk/jshell/VariablesTest.java