Fixes failing unit tests on travis (#8738)
Fixes failing unit tests on travis (#8738)

Use "trusty" VMs on travis.
jeffblack360/cakephp,thinkingmedia/cakephp,ADmad/cakephp,tenkoma/cakephp,thinkingmedia/cakephp,ionas/cakephp,davidyell/cakephp,ADmad/cakephp,cakephp/cakephp,tenkoma/cakephp,dakota/cakephp,ADmad/cakephp,ionas/cakephp,CVO-Technologies/cakephp,CVO-Technologies/cakephp,CakeDC/cakephp,garethellis36/cakephp,elboletaire/cakephp,CVO-Technologies/cakephp,elboletaire/cakephp,ADmad/cakephp,petteyg/cakephp,nrother/cakephp,dakota/cakephp,cakephp-fr/cakephp,petteyg/cakephp,tenkoma/cakephp,tgr0ss/cakephp,ndm2/cakephp,elboletaire/cakephp,garethellis36/cakephp,jeffblack360/cakephp,cakephp-fr/cakephp,HavokInspiration/cakephp,garethellis36/cakephp,HavokInspiration/cakephp,berrygoudswaard/cakephp,dakota/cakephp,davidyell/cakephp,davidyell/cakephp,nrother/cakephp,ionas/cakephp,mvdriel/cakephp,tgr0ss/cakephp,mvdriel/cakephp,HavokInspiration/cakephp,jeffblack360/cakephp,cakephp/cakephp,dakota/cakephp,petteyg/cakephp,mvdriel/cakephp,cakephp/cakephp,ndm2/cakephp,CakeDC/cakephp,CakeDC/cakephp,petteyg/cakephp,garethellis36/cakephp,thinkingmedia/cakephp,mvdriel/cakephp,ndm2/cakephp,CakeDC/cakephp,cakephp-fr/cakephp,tenkoma/cakephp,berrygoudswaard/cakephp,nrother/cakephp,cakephp/cakephp,tgr0ss/cakephp,ndm2/cakephp,berrygoudswaard/cakephp