Convert to using ::class in RouteBuilder tests.
Convert to using ::class in RouteBuilder tests.

Refs #9633

dakota/cakephp,mvdriel/cakephp,dakota/cakephp,cakephp/cakephp,petteyg/cakephp,mvdriel/cakephp,dakota/cakephp,tenkoma/cakephp,cakephp/cakephp,dakota/cakephp,petteyg/cakephp,tenkoma/cakephp,ndm2/cakephp,tenkoma/cakephp,CakeDC/cakephp,mvdriel/cakephp,garethellis36/cakephp,berrygoudswaard/cakephp,davidyell/cakephp,CakeDC/cakephp,ADmad/cakephp,tenkoma/cakephp,cakephp/cakephp,ADmad/cakephp,ndm2/cakephp,petteyg/cakephp,berrygoudswaard/cakephp,garethellis36/cakephp,cakephp/cakephp,mvdriel/cakephp,berrygoudswaard/cakephp,ndm2/cakephp,garethellis36/cakephp,ndm2/cakephp,davidyell/cakephp,CakeDC/cakephp,garethellis36/cakephp,ADmad/cakephp,petteyg/cakephp,CakeDC/cakephp,ADmad/cakephp,davidyell/cakephp