v0.32.0

Add a default for kibana_subdomain name @DavidWittman (#104)

Closes #82

what

• Set the default for kibana_subdomain_name to be ""

why

• Plans fail when this is not defined
• This value isn't required, it defaults to module.kibana_label.id
• elasticsearch_subdomain_name has a default as well

references

• Closes #82