Oozie reconfig forces the user to enter bogus values for two parameters in order to save any changes

Post installation, if you go to Oozie > Config, two validation errors are shown upon load and the Save button is grayed out.

oozie.service.HadoopAccessorService.nameNode.whitelist and oozie.service.HadoopAccessorService.jobTracker.whitelist are shown as "required". However, these have the default value of " " (single space character), and these should pass. In Install Wizard, no validation errors are displayed for the same parameters. Use the same validation methods, and write a unit test case for it.