RFR(XS): 8195824: tools/launcher/HelpFlagsTest.java fails with java.lang.AssertionError

[Lindenmaier, Goetz]

Hi,

javacpl seems not to have a help message, so it just needs to 
be excluded from the test. Please review.
http://cr.openjdk.java.net/~goetz/wr18/8195824-fixHelpTest2/webrev/

(I sent similar mail in reply to RE: JDK 11 RFR of JDK-8195987,,Problem list tools/launcher/HelpFlagsTest.java fails on windows)

Best regards,
  Goetz.