RFR 8191455/8191456: StartOptionTest/ToolProviderTest.testExitCode() and ExternalEditorTest.testStatementMush() failed

[Robert Field]

Please review.

Bugs:

     8191455: jdk/jshell/StartOptionTest.java and 
jdk/jshell/ToolProviderTest.java failed after changeset e0f08a
     https://bugs.openjdk.java.net/browse/JDK-8191455
     These saw failures on Windows due to line-end mismatches.  Fixed by 
normalizing line-ends.

     8191456: jdk/jshell/ExternalEditorTest.java testStatementMush(): 
failure
     https://bugs.openjdk.java.net/browse/JDK-8191456
     The expected output is not seen, not reproducible locally, Disabled 
the specific test and filed issue to enable.

This includes undoing:

     8191631: Problem list jdk/jshell/StartOptionTest.java, 
jdk/jshell/ToolProviderTest.java and jdk/jshell/ExternalEditorTest.java 
temporarily
     https://bugs.openjdk.java.net/browse/JDK-8191631

Webrev:

     http://cr.openjdk.java.net/~rfield/8191455v0.webrev/

Thanks,
Robert