Preview a form: thanks to LazyDynaBean

Most of the forms in this application use DynaValidatorForm in struts-config for the formBean; however, the PreviewBean used for previewing forms must be an instance of org.apache.commons.beanutils.LazyDynaBean in order to dynamically create the DynaBeans. See struts-config.xml and PreviewFormAction for the gory details.