Tune ansible.cfg
Tune ansible.cfg

Based on the OpenShift one:
https://docs.openshift.com/container-platform/3.7/scaling_performance/install_practices.html#scaling-performance-install-optimization

* Increases number of forks.
* Disables host_key_checking
* Smart gathering facts
* Fact caching jsonfile
* Enables profile_tasks callback
* Mutliplexes ssh connections (ControlMaster)
* Enables pipelining

fgal/ceph-ansible,font/ceph-ansible,ceph/ceph-ansible,fgal/ceph-ansible,ceph/ceph-ansible,font/ceph-ansible