(#8403) Do not require the uuidgen executable
(#8403) Do not require the uuidgen executable

The uuidgen executable is platform specific.  This change uses the guid
gem instead, which must be installed now for CloudPack to function.

Reviewed-by: Dan Bode

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