smoketest: Add (very simple) distro detection
smoketest: Add (very simple) distro detection

This should be enough to avoid doing the same test in the barclamps'
smoke testing scripts.

crowbar/crowbar,MaximilianMeister/crowbar,aspiers/crowbar,vwallfahrer/crowbar,nkrinner/crowbar,aspiers/crowbar,SUSE-Cloud/crowbar,toabctl/crowbar,rhafer/crowbar,mmnelemane/crowbar,aplanas/crowbar,SUSE-Cloud/crowbar,rsalevsky/crowbar,crowbar/crowbar,mmnelemane/crowbar,tserong/crowbar,vwallfahrer/crowbar,toabctl/crowbar,MaximilianMeister/crowbar,dirkmueller/crowbar,dirkmueller/crowbar,rhafer/crowbar,rhafer/crowbar,rsalevsky/crowbar,nkrinner/crowbar,aplanas/crowbar,tserong/crowbar