qa_crowbarsetup: provide a "ruby" and "gem" in PATH
qa_crowbarsetup: provide a "ruby" and "gem" in PATH

in Cloud5 and later we use ruby2.1
but several crowbar scripts just hardcode /usr/bin/env ruby

gosipyan/automation,vmoravec/automation,gosipyan/automation,vmoravec/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,SUSE-Cloud/automation,vmoravec/automation,vmoravec/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,aspiers/automation,aspiers/automation,SUSE-Cloud/automation