Add tests for new className() method on Association.
Add tests for new className() method on Association.

thinkingmedia/cakephp,ndm2/cakephp,thinkingmedia/cakephp,michaelze/cakephp,ADmad/cakephp,ndm2/cakephp,garethellis36/cakephp,petteyg/cakephp,mvdriel/cakephp,petteyg/cakephp,ADmad/cakephp,ADmad/cakephp,davidyell/cakephp,justinyost/cakephp,petteyg/cakephp,cakephp-fr/cakephp,nrother/cakephp,tenkoma/cakephp,nrother/cakephp,davidyell/cakephp,davidyell/cakephp,tenkoma/cakephp,mvdriel/cakephp,ionas/cakephp,berrygoudswaard/cakephp,mvdriel/cakephp,berrygoudswaard/cakephp,Phillaf/cakephp,CVO-Technologies/cakephp,dakota/cakephp,cakephp/cakephp,tgr0ss/cakephp,cakephp-fr/cakephp,elboletaire/cakephp,CakeDC/cakephp,HavokInspiration/cakephp,garethellis36/cakephp,CVO-Technologies/cakephp,berrygoudswaard/cakephp,CakeDC/cakephp,petteyg/cakephp,jeffblack360/cakephp,michaelze/cakephp,jeffblack360/cakephp,ionas/cakephp,justinyost/cakephp,HavokInspiration/cakephp,ndm2/cakephp,cakephp-fr/cakephp,justinyost/cakephp,mvdriel/cakephp,thinkingmedia/cakephp,michaelze/cakephp,garethellis36/cakephp,Phillaf/cakephp,CakeDC/cakephp,ADmad/cakephp,elboletaire/cakephp,tgr0ss/cakephp,dakota/cakephp,CVO-Technologies/cakephp,HavokInspiration/cakephp,elboletaire/cakephp,Phillaf/cakephp,dakota/cakephp,ionas/cakephp,dakota/cakephp,CakeDC/cakephp,tenkoma/cakephp,tenkoma/cakephp,garethellis36/cakephp,cakephp/cakephp,cakephp/cakephp,cakephp/cakephp,jeffblack360/cakephp,tgr0ss/cakephp,nrother/cakephp,ndm2/cakephp