Make fixtures disable source caching.
Make fixtures disable source caching.

Disabling source caching when using fixtures fixes
issues with test suites.  Testsuites could previously have
test order errors caused by differences in cached and un-cached sources listings.
Fixes #1942

jerems02/cakephp,ADmad/cakephp,bravo-kernel/cakephp,timhoeppner/cakephp,jeffblack360/cakephp,CVO-Technologies/cakephp,jerems02/cakephp,kumamidori/cakephp,ionas/cakephp,yinhe007/cakephp,elboletaire/cakephp,et304383/passbolt_api,petteyg/cakephp,burriko/cakephp,ADmad/cakephp,web-player/cakephp,HavokInspiration/cakephp,pbaire/cakephp,elboletaire/cakephp,timhoeppner/cakephp,eboominathan/cakephp,nrother/cakephp,tenkoma/cakephp,jjj117/cakephp,yinhe007/cakephp,petteyg/cakephp,tgr0ss/cakephp,tgr0ss/cakephp,michaelze/cakephp,pbaire/cakephp,khoimt/cakephp-study,thinkingmedia/cakephp,CVO-Technologies/cakephp,davidyell/cakephp,davidyell/cakephp,timhoeppner/cakephp,ndm2/cakephp,cakephp-fr/cakephp,bravo-kernel/cakephp,jerems02/cakephp,tenkoma/cakephp,adopico/cakephp,garethellis36/cakephp,adopico/cakephp,petteyg/cakephp,eryw/cakephp,CakeDC/cakephp,Balachan27/cakephp,CakeDC/cakephp,garethellis36/cakephp,michaelze/cakephp,mvdriel/cakephp,burriko/cakephp,eboominathan/cakephp,nrother/cakephp,tisu2tisu/cakephp,Phillaf/cakephp,web-player/cakephp,ndm2/cakephp,HavokInspiration/cakephp,erikfig/cakephp,jeffblack360/cakephp,berrygoudswaard/cakephp,HavokInspiration/cakephp,akintoey/cakephp,dkarvounaris/cakephp,et304383/passbolt_api,dakota/cakephp,dkarvounaris/cakephp,thinkingmedia/cakephp,davidyell/cakephp,cakephp/cakephp,mvdriel/cakephp,eryw/cakephp,akintoey/cakephp,et304383/passbolt_api,bravo-kernel/cakephp,khoimt/cakephp-study,eryw/cakephp,web-player/cakephp,ndm2/cakephp,justinyost/cakephp,dakota/cakephp,tgr0ss/cakephp,gmponos/cakephp,ionas/cakephp,mvdriel/cakephp,berrygoudswaard/cakephp,pbaire/cakephp,thinkingmedia/cakephp,CakeDC/cakephp,dkarvounaris/cakephp,ADmad/cakephp,berrygoudswaard/cakephp,michaelze/cakephp,gmponos/cakephp,ADmad/cakephp,garethellis36/cakephp,et304383/passbolt_api,jjj117/cakephp,Balachan27/cakephp,CVO-Technologies/cakephp,cakephp-fr/cakephp,justinyost/cakephp,cakephp-fr/cakephp,akintoey/cakephp,tenkoma/cakephp,tisu2tisu/cakephp,et304383/passbolt_api,adopico/cakephp,ndm2/cakephp,jeffblack360/cakephp,kumamidori/cakephp,tisu2tisu/cakephp,Phillaf/cakephp,burriko/cakephp,erikfig/cakephp,justinyost/cakephp,nrother/cakephp,Balachan27/cakephp,dakota/cakephp,ionas/cakephp,khoimt/cakephp-study,Phillaf/cakephp,tenkoma/cakephp,mvdriel/cakephp,elboletaire/cakephp,gmponos/cakephp,yinhe007/cakephp,petteyg/cakephp,kumamidori/cakephp,garethellis36/cakephp,eboominathan/cakephp,jjj117/cakephp,dakota/cakephp,cakephp/cakephp,cakephp/cakephp,cakephp/cakephp,CakeDC/cakephp,erikfig/cakephp