Add Ansible config from Openshift docs (ansible.cfg)

[luigiaparicio]

Would be nice if default ansible config is replace with the example shown in:
https://docs.openshift.com/container-platform/3.10/scaling_performance/install_practices.html#scaling-performance-install-optimization

/etc/ansible/ansible.cfg

Like this:

# config file for ansible -- http://ansible.com/
# ==============================================
[defaults]
forks = 20 
host_key_checking = False
remote_user = root
roles_path = roles/
gathering = smart
fact_caching = jsonfile
fact_caching_connection = $HOME/ansible/facts
fact_caching_timeout = 600
log_path = $HOME/ansible.log
nocows = 1
callback_whitelist = profile_tasks

[privilege_escalation]
become = False

[ssh_connection]
ssh_args = -o ControlMaster=auto -o ControlPersist=600s -o ServerAliveInterval=60
control_path = %(directory)s/%%h-%%r
pipelining = True 
timeout = 10

[blues-man]

Hey Luigi, good point. Some option is default in /etc/ansible/ansible.cfg but we can add the ones for faster connection such as fact_caching and ssh connection

Thanks!