RSpecs: Rack Ads include external references

[ahelsing@bbn.com]

Individual rack (not ExoSM) advertisement RSpecs should include external references - show links to non-local resources (whether they are Orca controlled or not). EG to the mesoscale, NLR, Internet2, etc.

These connections should follow the stitching guidelines:

-there must be a link element for each connection to an External Aggregate.
-these link elements will each have two interface_ref component_id
-one of the interface_ref component_id references a local node->interface component_id
-the other interface_ref component_id is equal to a  link--->interface_ref component_id  in a link element of the External Aggregate 
-both of the peering Aggregates need to point to each other in consistent manner within their mainBody:link elements

Note the relation to ticket #36

[ahelsing@bbn.com]

I now see that all the nodes have 1+ interfaces, and there is 1 link per such interface. And those links include 2 interface_ref elements. Good so far.

However, many of those references are to urn:publicid:IDN+exogeni.net+component+unknown

Clearly that needs work.

I haven't investigated whether all the logical external connections are represented.

[ahelsing@bbn.com]

There are still a log of component+unknown entries in the ExoSM Ad RSpec.