First implementation of filtering/grouping by fact
First implementation of filtering/grouping by fact

Ex: --group_by kernelversion
Will generate a group for each kernel version found and
put matching hosts in them.
So:
- "3.2" -> hosts -> node01, node02
- "3.13" -> hosts -> node03, node04
- etc

sepulworld/ansible-inventory-puppetdb,dmsimard/ansible-inventory-puppetdb