Network provider does not have an update method

[towo]

Right now, the virish provider for libvirt_network does not have an update method. As such, if the configuration specifies a network configuration different from the extant configuration, this will be a persistent change that never gets implement because virsh define is called but never evaluated for an error.

[trefzer]

this is correct an 'sort of' purpose.
Changing a network is not a usual task and can have a really big impact. So for me this has more risks than values. If you like to implement, please create a merge request.