Ports in Links and Nodes are dicts, not Port objects

[sajith]

These lines in LinkHandler look right:

datamodel/src/sdx/datamodel/parsing/linkhandler.py

Line 18 in cb8c653

ports = data["ports"]

datamodel/src/sdx/datamodel/parsing/linkhandler.py

Line 37 in cb8c653

ports=ports,

Also these lines in NodeHandler:

datamodel/src/sdx/datamodel/parsing/nodehandler.py

Line 19 in cb8c653

ports = data["ports"]

datamodel/src/sdx/datamodel/parsing/nodehandler.py

Line 32 in cb8c653

ports=ports,

[sajith]

It is probably better to leave this alone for now, until we have made some progress on #92. The discussion on atlanticwave-sdx/sdx-controller#190 also is relevant.

In the interim, when implementing L2VPN pieces in pce, I think we can make do with Ports encoded-as-dicts.

[YufengXin]

node.set_ports() returns the Port objects because it call port_handler(), while link.set_ports() returns dict,
-> node.ports (Port) and link.ports (dict).

As a reminder when make changes.