molecule managed resourced should be identifable by tags

[ssbarnea]

Currently molecule does not tag builded images which makes impossible to identify which contrainers or images from a docker host were created by it.

Same issue applies to other providers and we need to assure that we add at least one tag that would allow us to identify molecule managed resources.

Once we do start tagging resources it will be possible to implement a molecule reset feature that would cleanup lefovers, from current runs or any other molecule runs.

While implementing this we can safely assume that we cannot rely on any local data persistency, all the information should be contained in each used provider.