[Reviewer: Andy] Don't resolve SAS hostname to IP address - sas-client does this anyway

Andy,

Please can you review my fix to make chef not resolve the SAS hostname to an IP address.  The sas-client library supports this itself.  I've live-tested by spinning up a deployment and checking that /etc/clearwater/config contains the hostname and that bono and sprout still successfully connect to the SAS (meaning that they have resolved the IP address correctly themselves).

Thanks,

Matt