During the new `add-networks` command we:
Add the new network to the provider context
Add the new network to the /etc/cloudify/certificate_metadata file
Create new internal certificates
All managers in a cluster have to have to same certificates, but we currently don't sync certificates between them.
We need to make sure the new certificates are updated throughout the cluster, and to test that the new `add-networks` command actually work in a HA scenario.