Ansible warning about env vars

[PaulFarault]

A warning from Ansible appears each time we execute a command related to operations:

[WARNING]: Missing required 'tdp_collection' option for 'tdp_vars' inventory plugin. 'tdp_vars' will NOT be read. Have you set the environment variable 'TDP_COLLECTION_PATH' ? If your Ansible tasks does not use 'tdp_vars' it will works.

Although this warning can be ignored, as it has no impact on the playbooks execution (environment variables are passed to the ansible-playbook command), it would be nice to remove it. Either by fixing the problem or finding a way to specifically ignore it.