In the event you have different disks in nodes assigned to each role
you may need to pass role specific parameters, e.g like:
parameter_defaults:
OpenShiftMasterParameters:
OpenShiftGlusterDisks:
- /dev/vdc
OpenShiftWorkerParameters:
OpenShiftGlusterDisks:
- /dev/vdd
To enable that we create an inventory file per role, and pass the directory
of files to ansible.
Change-Id: I8b4d8698405ffb004b081e1f097f300216edfa77