Improve performance in eagerloader
Improve performance in eagerloader

When loading external associations we need to enumerate all the records
in the statement. Using fetchAll() results in fewer lines of code
running and fewer allocations as the buffered results are not resized
multiple times.

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