run_in_prod is no longer needed.

We only have a Chef jig if one was created via the inject_chef_conn
rake task, so we no longer need this guard for the unit test.

While we are at it, get rid of a redundant call to Jig.delete_node in the
node model -- for now, we handle calling the jigs for create and delete in
the controller.
Merge pull request #494 from VictorLowther/pull-req-master-8c27aa9750f06dbcc92cbe2885def90fa64997a7

Looks good.  At least we are consistent in having the Jig create/delete in the wrong place (should not be in the controller).  We can move it after we get it working as is..