fix chefspec depreciation warning about `should`
Merge pull request #56 from bkw/chefspecDepreciation

fix chefspec depreciation warning about `should`
updating common files

updating files: [".rubocop.yml"]
Merge pull request #59 from TelekomLabs/update-common

updating common files
standalone installation needs ohai cookbook as dep
Merge pull request #61 from aschmidt75/master

standalone installation needs ohai cookbook as dep