Fix up client creation script to work with Chef 11.
Add a mutex to protect against silly Chef::Config globals.
Merge pull request #62 from VictorLowther/pull-req-master-402e9ce91111702c1f810a6a19545ee4d489a3f9

CB 2.0: Make the network barclamp really work, and make all the recipes really Chef11 compliant. [5/5]