Make molecule vagrant a collection: community.vagrant

[ssbarnea]

As there is no official vagrant collection and we already have the most advanced vagrant module for it, we use this repository to ship two products:

• molecule-vagrant python package (already done now)
• community.vagrant ansible collection

As soon we have the collection published on galaxy, we will change the molecule driver to make use of it and avoid using the module directly as this does not work with execution environments.

A side effect of this change will be that molecule-vagrant users will be able to use the driver with any version of ansible they have as required collection(s) will be installed automatically.

I already asked @gundalow about this and he did not see a problem of publishing a community.vagrant collection from ansible-community/molecule-vagrant repository, as both organizations have the same community-first contribution models and security models.

The main benefit of keeping both products inside the same codebase is related to testing as testing vagrant on several platforms is very resource intensive. Having them split in two would make development very hard.

Anyone is welcomed to start working towards this goal. I will try to provide support, for example one repository that does something similar (dual collection and python package) is https://github.com/openstack/tripleo-repos