Revert "Hack for getting stdout, stderr, exit status in 1.8"
Revert "Hack for getting stdout, stderr, exit status in 1.8"

SSH with pty merge stderr to stdout, so do same thing with local exec.

This reverts commit 043e769aa6e656f8034e7cac839b5e8e549b5a1a.

Conflicts:

	lib/serverspec/backend/exec.rb

podenski/serverspec,kitak/serverspec,punkle/serverspec,ttakamura/serverspec,linyows/serverspec,cosmo0920/serverspec,smontanari/serverspec,Plus81/serverspec,naga2raja/serverspec,elmundio87/serverspec,a3no/serverspec,tatsuyafw/serverspec,ShawInnes/serverspec,kui/serverspec,pfaffle/serverspec,mizzy/serverspec,aschmidt75/serverspec,hanazuki/serverspec,studio3104/serverspec,danshultz/serverspec,pmenglund/serverspec,aibou/serverspec,muddydixon/serverspec,zakkie/serverspec,darklore/serverspec,inokappa/serverspec,matsuo/serverspec,shatano/serverspec,catatsuy/serverspec,takai/serverspec,stephenrjohnson/serverspec,cl-lab-k/serverspec,higanworks/serverspec,uroesch/serverspec,hunner/serverspec,vincentbernat/serverspec,naoya/serverspec,sergueik/serverspec,yono/serverspec,tkuchiki/serverspec,RoboticCheese/serverspec,DarrellMozingo/serverspec,ryotarai/serverspec,presto53/serverspec,mekf/serverspec,k1LoW/serverspec,youpy/serverspec,elibus/serverspec,supertylerc/serverspec,treydock/serverspec,netmarkjp/serverspec,cs-travis/serverspec,minimum2scp/serverspec,ihassin/serverspec,3100/serverspec,doc75/serverspec,orangain/serverspec,flozano/serverspec,nishigori/serverspec,tmtk75/serverspec,tacahilo/serverspec,dhoer/serverspec,benr/serverspec,tagomoris/serverspec,pmorton/serverspec,bitglue/serverspec,ijin/serverspec,serverspec/serverspec