bug fix - use the default name if grails.plugin.standalone.jarname isn't set
bug fix - use the default name if grails.plugin.standalone.jarname isn't set

shivanykshenoy/grails-standalone,kdickerson/grails-standalone,grails-plugins/grails-standalone,grails-plugins/grails-standalone,shivanykshenoy/grails-standalone,kdickerson/grails-standalone