hg: jdk9/dev/langtools: 8173577: JShell tests: Some testng tests check nothing

[robert.field at oracle.com]

Changeset: ca18223ce9ee
Author:    rfield
Date:      2017-02-01 09:10 -0800
URL:       http://hg.openjdk.java.net/jdk9/dev/langtools/rev/ca18223ce9ee

8173577: JShell tests: Some testng tests check nothing
Reviewed-by: jlahoda

! src/jdk.jshell/share/classes/jdk/jshell/execution/FailOverExecutionControlProvider.java
! src/jdk.jshell/share/classes/jdk/jshell/execution/JdiDefaultExecutionControl.java
! test/jdk/jshell/ExecutionControlTestBase.java
! test/jdk/jshell/FailOverDirectExecutionControlTest.java
! test/jdk/jshell/FailOverExecutionControlDyingLaunchTest.java