Entity::isEmpty() / Entity::hasValue() add string zero test case
Entity::isEmpty() / Entity::hasValue() add string zero test case

ADmad/cakephp,cakephp/cakephp,cakephp/cakephp,ndm2/cakephp,CakeDC/cakephp,ADmad/cakephp,ADmad/cakephp,CakeDC/cakephp,ndm2/cakephp,cakephp/cakephp,CakeDC/cakephp,ndm2/cakephp,ADmad/cakephp,ndm2/cakephp,CakeDC/cakephp,cakephp/cakephp