Handle missing or bad dmidecode

dmidecode isn't functional on all architectures.  Don't treat a missing
binary or a missing DMI table as fatal from an install POV.

Change-Id: I33c50ee00ac0b478839b2536f0b965e444e66e53
Related-Bug: 1790447

docker/services/ceph-ansible/ceph-base.yaml

@@ -412,6 +412,10 @@ outputs:
                       - name: register machine id
                         command: dmidecode -s system-uuid
                         register: machine_uuid
+                        # NOTE(tonyb): 0 == no error, 1 == -EPERM or bad data and 2 == Command not found
+                        # 1 and 2 aren't great but shouldn't cause the deploy to fail.  If we're using
+                        # the node specific data we'll fail then.  If we aren't then lets keep moving
+                        failed_when: machine_uuid.rc not in [0, 1, 2]
                       - name: generate host vars from nodes data
                         local_action:
                           module: copy