Make sure we don't get confused by someone else having created /opt/dell.

Instead, check to be certian that we are in fact an admin node before creating
a new client for ourselves.
Merge pull request #13 from VictorLowther/pull-req-master-eead8c377fb1684105b7061b782b80385cb8711d

Fix up chef barclamp setup routine [1/1]
new install action 01-bringup-chef.install

This starts all the services required to bring up the chef server.
Mostly imported from install-chef-suse.sh.

Moved "make_crowbar_user" to 02_make_crowbar_user to be executed after the chef
server is running.
New install-action: create-admin-role

Creates the Crowbar admin-node role which is needed later on in the install
process.