JShell tests: Some testng tests check nothing

After langtools test run I ran following command
find . -name *.jtr -exec grep -H "Total tests run: 0" {} \;

Found tests which needs to be revised.
./jdk/jshell/JdiListeningExecutionControlTest.jtr:Total tests run: 0, Failures: 0, Skips: 0
./jdk/jshell/FailOverExecutionControlTest.jtr:Total tests run: 0, Failures: 0, Skips: 0
./jdk/jshell/FailOverExecutionControlHangingLaunchTest.jtr:Total tests run: 0, Failures: 0, Skips: 0
./jdk/jshell/FailOverExecutionControlDyingLaunchTest.jtr:Total tests run: 0, Failures: 0, Skips: 0
./jdk/jshell/JdiLaunchingExecutionControlTest.jtr:Total tests run: 0, Failures: 0, Skips: 0
./jdk/jshell/JdiListeningLocalhostExecutionControlTest.jtr:Total tests run: 0, Failures: 0, Skips: 0
./jdk/jshell/FailOverExecutionControlHangingListenTest.jtr:Total tests run: 0, Failures: 0, Skips: 0