Update postgres schema reflection query.
Update postgres schema reflection query.

Use different conditions in foreign key reflection that match index
reflection. This should solve issues around tables in non-default
schemas failing to reflect correctly.

Refs #8503

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