start migrating to the new deployment/snanpshot/role models
* Jig delegation to jig instances
* fix spec_helper to use file.expand_path
* rspec shared contexts for:
  * "crowbar test deployment" - crowbar barclamp deployment is required by node.status (which is an attribute)
  * "2 dummy nodes" - exactly what it says. They're called unit1.test.com (and 2)
* rspec tests for jig delegation
Merge pull request #448 from aabes/pull-req-master-ec41a8fec45f192dbea2f0ee61264b87a926486f

Jig delegation model start & rspec setup for shared contexts [1/1]