Actualizada la clase LoginCrontroller para los cambios propuestos
Merge branch 'master' of https://github.com/bqreaders/chat-kata-extended

Conflicts:
	server/grails-app/services/chat/kata/LoginService.groovy
	server/test/unit/chat/kata/LoginControllerTests.groovy
	server/test/unit/chat/kata/UserControllerTest.groovy