Description of problem:
-----------------------

---- Creating OSD with persistent device naming i.e if we are using by-path it recognizes devices but fails to recognize dedicated_devices.

---- It fails due to below task:-

~~~~~
roles/ceph-facts/tasks/facts.yml:224
- name: resolve device link(s)
  command: readlink -f {{ item }}
  changed_when: false
  check_mode: no
  with_items: "{{ devices }}"                <----------
  register: devices_prepare_canonicalize
  when:
    - devices is defined
    - inventory_hostname in groups.get(osd_group_name, [])
    - not osd_auto_discovery | default(False) | bool
~~~~


Version-Release number of selected component (if applicable):
RHCS 4.x


How reproducible:

Steps to Reproduce:
-------------------

1. Deploy RHCS 4.1 with persistent device naming by using by-path.

2. Use below scenario:
~~~
egrep -v "^#|^$" group_vars/osds.yml
---
dummy:
osd_scenario: lvm
devices:
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:6
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:7
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:4
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:5
dedicated_devices:
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:2
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:2
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:1
  - /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:1
~~~


Actual results:
---------------
Fails to deploy OSDs in the cluster

Expected results:
-----------------
Should be able to deploy OSDs.


Additional info:
----------------

Ref:- 
- https://github.com/ceph/ceph-ansible/blob/master/roles/ceph-facts/tasks/facts.yml#L193-L202
- https://github.com/ceph/ceph-ansible/pull/5584