(#10871) Added spec test for Fog credentials
(#10871) Added spec test for Fog credentials

When credentials are set in the options hash, it should set those before
calling `Fog::Compute.new`

16nsk/puppetlabs-cloud_provisioner,puppetlabs/puppetlabs-cloud_provisioner,puppetlabs/puppetlabs-cloud_provisioner,amos6224/puppetlabs-cloud-provisioner