hg: jdk/submit: 8199623: JShell: corralling not restored on drop

[robert.field at oracle.com]

Changeset: 1c291d1c272c
Author:    rfield
Date:      2019-06-03 08:21 -0700
URL:       http://hg.openjdk.java.net/jdk/submit/rev/1c291d1c272c

8199623: JShell: corralling not restored on drop
Reviewed-by: jlahoda

! src/jdk.jshell/share/classes/jdk/jshell/Eval.java
! test/langtools/jdk/jshell/DropTest.java
! test/langtools/jdk/jshell/ToolSimpleTest.java