* Add pod creation, so that when we remove the hypervisor
then all the VMs also get removed automatically
* virtinst is only used when creating/installing VMs, so
only install on hypervisor nodes
* Only grab the top vlan if we have 2, this typically
means that we have an ipv4 and ipv6 IP. Could probably
do this better, but keep it simple for the time being
* Update the function, such that when subnet_id is null, then based on
the vlan, grab the details from the subnets defined, and update the
links based on this. This ensures that all subnets are auto-assigned
and the externel_vlan is dhcp from the upstream network
* Revert the network_auto function, as the above change would help with
the issues we faced before
* Update all the maas function calls, and assign them to a variable or
direct the output to /dev/null, as we don't want the screen to be
filled with all the information
TODO: Have viable output to the CLI, so that you have some details of
what is going on
* Move stuff from common to default, as it didn't make sense
* use virsh_user instead, that was its more customisable
* Revert the change to manage-maas-nodes.sh now use extra function to
call maas_auto_assign_networks instead
* More comments to the code
* Move all configs into config directory
* Move all examples into example directoy
* Move all common functions into functions.sh
* Fine tune a few other functions
* Moved common hypervisor config away
* Added examples for some of the hypervisor configs
* Start work on snap enablement of boostrap-maas.sh script
