hg: jdk/sandbox: More cleanup. Also fix up jshell tests that depend on exception messages

[alan.bateman at oracle.com]

Changeset: 7eb6cdd1204a
Author:    alanb
Date:      2019-02-11 08:39 +0000
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/7eb6cdd1204a

More cleanup. Also fix up jshell tests that depend on exception messages

! src/java.base/share/classes/java/net/DelegatingSocketImpl.java
! src/java.base/share/classes/java/net/ServerSocket.java
! test/langtools/jdk/jshell/JdiFailingLaunchExecutionControlTest.java
! test/langtools/jdk/jshell/JdiHangingListenExecutionControlTest.java