install-chef-suse: Check bc-template-provisioner.json exists
install-chef-suse: Check bc-template-provisioner.json exists

Before changing it, check that bc-template-provisioner.json exists. We
already do this for bc-template-dns.json.

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