[upgrades] UpgradeHelper methods do not work with network template

[Aleksey Kasatkin]

Versions: Fuel 7.0 and later.

UpgradeHelper methods "copy_network_config" and "copy_vips" do not work properly in case of using network template.

Network roles to networks mapping and custom names of networks (that can be changed when using network template) are not considered in "copy_vips" method.
Network template is not copied and custom networks and not copied in "copy_network_config" method.

So, environments that were deployed using network templates cannot be upgraded.

[Oleg S. Gelbukh (gelbuhos)]

Here we need to implement a handle in API extension to explicitly specify the list of VIPs that has to be preserved in the upgraded environment.

[Anton Matveev (amatveev)]

current issue does not affect existing tests and relates to limited group of deployments (with networking templates), can be safely moved to maintenance release and delivered with MU1

[Ilya Kharin (akscram)]

This bug is partially fixed by the next bug reports:
    https://bugs.launchpad.net/fuel/+bug/1612297
    https://bugs.launchpad.net/fuel/+bug/1616817
    https://bugs.launchpad.net/fuel/+bug/1584044
    https://bugs.launchpad.net/fuel/+bug/1612297
This bug can be moved to 9.2 without affecting the current functionlity.

[Anton Matveev (amatveev)]

octane specific, moving to won't fix due to shifted priorities