Integrated software raid

(cherry picked from commit 5151a748ad2d98d78457f7988bdb29bb34aef9ad)

Conflicts:
	crowbar_framework/app/models/node_object.rb
Refactored crowbar service for better readability

(cherry picked from commit 5bb1cfb994b286f161bf0c81adc91f66a05c5332)
Simplified claiming commands that include save method

(cherry picked from commit 6339f21e325568f0d9698e29a407e1869ac5c720)
Removed regex match and replaced it with a string function

(cherry picked from commit 4e4add0c6d85b771bd628daa37559dbcb23d1e49)
Synced disk claiming with deployer, added crowbar wall initial value

(cherry picked from commit 6f9db7d3bce28e1b7019274238dbdb86b68f86f2)
Fixed single disk raid naming

(cherry picked from commit b4bdd3d24bcdefd6f11abdaf06ca96414a01e4fb)
Renamed save_it to transition_save_node

(cherry picked from commit f795fd959f6bb26eeb935019370f5d6617e2cdd0)

Conflicts:
	crowbar_framework/app/models/crowbar_service.rb
Updated unique device path order

For details you can see the reference here:
https://github.com/crowbar/barclamp-deployer/blob/release/stoney/master/chef/cookbooks/barclamp/libraries/barclamp_library.rb#L320

(cherry picked from commit d0dac5df40abc07c4295780f9526e2f6c97adacd)
Merge pull request #981 from vuntz/swraid-roxy-part2

Backport of software raid to roxy (part 2)