Refactor Role Order to Avoid Additional Docker Service Stop/Starts

[owine]

With the current order of tasks, we have multiple stops/starts of the Docker service. For example, a flow as follows:

1. Stop Docker service
2. Perform Docker role tasks
3. Start Docker service
4. Stop Docker service
5. Perform UnionFS role tasks
6. Start Docker service

Ideally, we could do a flow of:

1. Stop Docker service
2. Perform Docker role tasks
3. Perform UnionFS role tasks
4. Perform any other role tasks that require the Docker service to be stopped
5. Start Docker service

This would speed up runs of the meta tags.

[saltydk]

Close if you feel like the traefik3 changes are enough.