API hostname regex should support a dash in hostname

[mattkirby]

From #218

Found a small bug making the API choke on hostnames containing a dash:

lib/vmpooler/api/helpers.rb:120 reads:

if domain && hostname =~ /^\w+.#{domain}$/
but should be:

if domain && hostname =~ /^[a-zA-Z0-9-]+.#{domain}$/

[yachub]

We're migrating issue management to Jira, so tracking this has been moved to https://puppet.atlassian.net/browse/POOLER-218

[yachub]

We're migrating issue management to Jira, so tracking this has been moved to https://puppet.atlassian.net/browse/POOLER-218

Apologies for the noise, we went full circle here and decided to move from Jira Cloud to GitHub Projects instead.