node: fix race in accessing n.nodeID
node: fix race in accessing n.nodeID

Signed-off-by: Alexander Morozov <2043cda4df124b840b98ee1c4307c199042efdf7@gmail.com>

fate-grand-order/swarmkit,elifa/swarmkit,vasil-yordanov/swarmkit,sungwonh/swarmkit,Noyan759/swarmkit,dperny/swarmkit-1,RenaudWasTaken/swarmkit,aaronlehmann/swarmkit,alyyousuf7/swarmkit,cheyang/swarmkit,alyyousuf7/swarmkit,jlhawn/swarmkit,yongtang/swarmkit,aaronlehmann/swarmkit,docker/swarmkit,diogomonica/swarmkit,AliyunContainerService/swarmkit,yongtang/swarmkit,Noyan759/swarmkit,sungwonh/swarmkit,jlhawn/swarmkit,cezarsa/swarmkit,diogomonica/swarmkit,elifa/swarmkit,deljuven/swarmkit,docker/swarmkit,fate-grand-order/swarmkit,allencloud/swarmkit,cheyang/swarmkit,vasil-yordanov/swarmkit,allencloud/swarmkit,deljuven/swarmkit,AliyunContainerService/swarmkit,RenaudWasTaken/swarmkit,cezarsa/swarmkit,dperny/swarmkit-1