Adding new HAProxy role
Added default variable values for HAProxy role
Added HAProxy role handlers
Added default HAProxy config file
Add iptable rules needed for HAProxy role
Added HAProxy config file
Added rsyslog config for HAProxy logging
Added logrotate configs for HAProxy logs
Added rsyslog config file
Added logrotate config files
Added proxy playbook
Added example proxyservers host group
Added new proxy playbook
Minor code formatting