Update the DD of OOB with gnt-cluster epo
Update the DD of OOB with gnt-cluster epo

This command came up in a local discussion about how much logic we
should put into gnt-node power off. We decided to go with a separate
convenience command which takes care of all the steps through the
procedures to turn down the cluster into a state suitable for a shutdown
of the underlying machine.

Signed-off-by: René Nussbaumer <bc755ac45a0e799d1d490cba76febc56d80cc5fc@google.com>
Reviewed-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>

apyrgio/snf-ganeti,ganeti/ganeti,ganeti/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,onponomarev/ganeti,bitemyapp/ganeti,andir/ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,andir/ganeti,onponomarev/ganeti,dimara/ganeti,mbakke/ganeti,leshchevds/ganeti,andir/ganeti,yiannist/ganeti,bitemyapp/ganeti,ganeti-github-testing/ganeti-test-1,mbakke/ganeti,ganeti/ganeti,yiannist/ganeti,leshchevds/ganeti,mbakke/ganeti,yiannist/ganeti,dimara/ganeti,leshchevds/ganeti,apyrgio/ganeti