topology version number should increase upon administrative changes

[italovalcy]

as specified on the Topology data model spec:

version is an unsigned integer and starts as 1 when the OXP is added to the AW-SDX and it will increment by 1 every time that there is an administrative change that MODIFIES the topology. Administrative changes are those created by the network operators. Below are some examples of changes that modify the topology and will increase the version number:

• A new node is added or removed by the OXP operator..
• A new link is added or removed.
• A new user port is configured.
• When the location of an item changes (node moved to a different address).
• A link or node is set to maintenance mode and becomes unusable.
• A link that was reconfigured to go through a different location (city or country).
• A change on the port/interface bandwidth via configuration.
• A change on the list of VLAN IDs supported by an interface via configuration.

Currently, AFAIK the increment is not happening as specified above.