fix get fqdn

you cant simple check if ```socket.gethostname()``` returns a string with a dot. 

A hostname can have a dot in its name and still not be FQDN!
This patch will return the socket.fqhostname() if it's longer then the socket.hostname().

Note: this patch was not tested... but please resolve this issue.
removed else
Merge branch 'fix_fqdn' of https://github.com/steverweber/salt into fix_ddns2