Implement openio cluster incident HOST

[jfsmig]

We need an easy and efficient way to mark down all the services known to be hosted on the given host.
Currently, this could be implemented like this:

( PROXY=127.0.0.1:6000 ; IP=127.0.0.2 ; oio-cluster -r "$OIO_NS" \
 | awk -F\| "/$IP:/{print \$3,\$2}" \
 | while read IP TYPE ; do
     curl -v -XPOST "http://${PROXY}/v3.0/${OIO_NS}/conscience/lock" \
          -d "{\"addr\":\"${IP}\",\"type\":\"${TYPE}\",\"score\":0,\"tags\":{\"tag.up\":false}}"
   done )