Bug: Cephadm role fails if cephadm_host_labels absent in group/host vars #74
Description
Role's defaults are not sufficient:
TASK [stackhpc.cephadm.cephadm : Template out cluster.yml] ***********************************************************************************************************************************************************************************
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: ansible.errors.AnsibleUndefinedVariable: 'ansible.vars.hostvars.HostVarsVars object' has no attribute 'cephadm_host_labels'
fatal: [sv-hdd-12-0]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'ansible.vars.hostvars.HostVarsVars object' has no attribute 'cephadm_host_labels'"}