Added firewalld role

Firewalld role should handle disabling the firewall, allowing outside
connections to interact with the idp.
Added firewalld role

Firewall should now have ports 443 and 80 opened by ansible.
Added a task to restart firewalld

Restarting firewalld is necessary for configuration changes to take
effect.
Merge branch 'develop' into feature/firewalld-control
Merge branch 'develop' into feature/firewalld-control
Opened port 8443

Port 8443 is necessary for communication between SP's and IdP's.
Merge pull request #56 from ausaccessfed/feature/firewalld-control

Added firewalld control
Resolves #46