When removing a node don't ssh to it
When removing a node don't ssh to it

Even in 1.2 this behaviour is broken, as the rpc call will remove the
ssh keys before we get a chance to log in. Now the rpc takes care of
shutting down the node daemon as well, so we definitely can avoid this.

This makes the LURemoveNode operation work again with the threaded
master daemon.

Reviewed-by: iustinp

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