CORE-5201 Added Multi-file output validator.

Added a DiskResourceUnixGlobValidator to validate Multi-file output glob patterns.
Added a IPlantDefaultValidator interface for CmdLineArgCharacterValidator, DiskResourceNameValidator, and DiskResourceUnixGlobValidator so they will not be removed from their fields by the ArgumentEditorConverter in the ui-apps-widgets-module.
(cherry picked from commit 6490ff1c101efa41edd1f58ef4d43f60ff52f198)

Conflicts:
	src/main/java/org/iplantc/de/commons/client/validators/CmdLineArgCharacterValidator.java