Revert to using static instead of self for in method constants usage.
Revert to using static instead of self for in method constants usage.

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