[cern] Get minion ip from metadata or host
In ironic we don't have the metadata service available so we need another way to get the node ip. To not change the current behaviour, try to get to the node IP from the metadata service with timeout 60s and then fallback to get it from the node.
jira: OS-6966
Signed-off-by: Spyros Trigazis spyridon.trigazis@cern.ch