RFR: JDK-8217902: jpackage fails with --app-image option on mac

[Andy Herrick]

  JDK-8217902: jpackage fails with --app-image option on mac

Please review the jpackage fix for bug [1] at [2].

This is a fix for the JDK-8200758-branch branch of the open sandbox 
repository (jpackage).

The fix is to remove the over-aggressive validation in 
DeployParams.validate() and update WinAppBundler to be the same as Mac 
code.

[1] https://bugs.openjdk.java.net/browse/JDK-8217902

[2] http://cr.openjdk.java.net/~herrick/8217902/webrev.01/


/ANdy