added petio role

[chazlarson]

Description

Initial pass at petio role using hotio image

How Has This Been Tested?

• [x] Installed on my develop-based cloudbox production setup
• [x] Went through initial setup; scan is running

New Role Checklist:

• [x] I have reviewed the Contribute page in the wiki
• [x] I have updated the header in any files I may have used as templates with my own information
• [x] I have added my new role to appveyor.yml
• [x] I have added my new role to community.yml
• [x] I have verified that any Docker images used are current and supported.