Add a basic disk reservation system to CB 2.0, and fix up the Ceph barclamp to use it. [1/3]

This adds a basic framework to allow Chef recipes to reserve disks on
nodes, along with core Crowbar support for making sure those
reservations are known to all noderole runs.


 crowbar_framework/app/models/jig.rb  | 14 ++++++++++++++
 crowbar_framework/app/models/node.rb | 11 +++++++----
 2 files changed, 21 insertions(+), 4 deletions(-)

Crowbar-Pull-ID: 49d97fa8999a043f27517044314ccec9d4ee9065

Crowbar-Release: development