[Azure] Stop unused VMs

[lkhomenk]

Issue: from time to time we get VMs named not by common practice 'nick','blablblba','justsometext' etc and they can be forgotten by the owner for some time. is this case our cleanup jobs will miss them
Idea: Stop all VM which are not in whitelist/don't have dnd/ etc (Do we have a requirement for VM to stay for a long period except adding IRC nickname into vm_name?)
Stopped VM won't cost anything for us. Cleanup them after N days/weeks/ or if they are forgotten/unused?
@mpusater, @mshriver , @izapolsk