Crowbar does not know about newly plugged disks

[vuntz]

If you plug a disk to a node after having allocated the node, then crowbar will never know about the disk.

The chef-client run that occurs every 15 minutes will update node["block_device"], but the code that translates node["block_device"] to node["crowbar"]["disks"] is done in the transition method of deployer_service.rb (barclamp-deployer).

The issue is that all the barclamps that want to know about the disks will look at node["crowbar"]["disks"] because there's some additional needed information (and unneeded devices listed in block_device are filtered).

This can be worked around by forcing a transition:

crowbar crowbar transition <node> foo
crowbar crowbar transition <node> ready

But that's obviously suboptimal.