* devel-2.1:
  cfgupgrade: allow working with relative paths
  Cleanup /etc/hosts during node removal
  verify cluster: check /etc/hosts consistency
  Change the migration message
  qa: enable early release during parallel burnin
  Fix pylint 0.20.0 warnings
  KVM: make tags available in KVM_NET_SCRIPT
  Remove "ssconf.CheckMasterCandidate"

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>