Specify Serverspec::Commands::Base explicitly
Specify Serverspec::Commands::Base explicitly

Because in spec for serverspec itself, commands should be included for each OS.

But in Serverspec::Filter, commands are not defined because it's not included.

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