Add options for Zerigo List Hosts

Add options to List Hosts for fqdn, page, per_page. 

There is a little overlap find_hosts, but this adds pagination as well.

I always have a little problem with the Shindo tests, so let me know if those need updating. 
Rubocop had no problem with mutable select, but I changed it anyway. Didn't say anything about  spacing around curly braces, so left as it. Updated single quotes.