Evaluate direct container <-> container connections

[clly]

Currently the networking model for communication between containers happens with
the host in between all of them. Before changing this model we need to ensure
that it will work. Use the bash-poc's to create containers that have a direct
connection between containers and also a connection to the host. We want to
validate the following:

• We can directly connect a container to another container without a bridge
• Can we provide connectivity between all containers when there is not yet a
  direct connection to avoid potential convergence issues