Fix file_spec of freebsd for serverspec v2
Fix file_spec of freebsd for serverspec v2

uroesch/serverspec,tacahilo/serverspec,mekf/serverspec,higanworks/serverspec,elibus/serverspec,RoboticCheese/serverspec,minimum2scp/serverspec,serverspec/serverspec,Plus81/serverspec,aschmidt75/serverspec,mizzy/serverspec,ShawInnes/serverspec,inokappa/serverspec,sergueik/serverspec,DarrellMozingo/serverspec,ihassin/serverspec,supertylerc/serverspec,pfaffle/serverspec