[Jenkinsfile] Check of RH update availability - fix syntax
[Jenkinsfile] Check of RH update availability - fix syntax

subutai-io/Subutai,subutai-io/Subutai,subutai-io/Subutai,subutai-io/Subutai,subutai-io/base,subutai-io/base,subutai-io/base,subutai-io/Subutai,subutai-io/Subutai,subutai-io/base