Fix participant_2_port data structure.#todo

[castroflavio]

These should be automatically generated using the sdx_config.cfg

[castroflavio]

Maybe, we could have some authentication service bootstrapping sdx_global.cfg (topology discovery) in a secure manner similar to L2 switching authentication schemes.

[castroflavio]

Adding Physical ports for A
{1: 'A', 2: 'C', 13: u'A'}
Adding virtual ports for A
Adding Physical ports for C
{1: 'A', 2: 'C', 4: u'C', 13: u'A', 15: u'C'}
Adding virtual ports for C
Adding Physical ports for B
{1: 'A', 2: 'C', 4: u'C', 13: u'A', 14: u'B', 15: u'C'}
Adding virtual ports for B
Parsing participant's policies
Starting VNH Assignment
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 763, in run
self.__target(_self.__args, *_self.__kwargs)
File "/users/castrofl/pyretic/pyretic/sdx/main.py", line 118, in dynamic_update_policy_event_hadler
update_policy()
File "/users/castrofl/pyretic/pyretic/sdx/main.py", line 103, in update_policy
sdx_parse_policies(cwd+'/pyretic/sdx/sdx_policies.cfg',self.sdx)
File "/users/castrofl/pyretic/pyretic/sdx/lib/core.py", line 335, in sdx_parse_policies
vnh_assignment(sdx)
File "/users/castrofl/pyretic/pyretic/sdx/lib/vnh_assignment.py", line 378, in vnh_assignment
participant_2_prefix = get_part2prefixes(sdx,participant_2_port)
File "/users/castrofl/pyretic/pyretic/sdx/lib/vnh_assignment.py", line 125, in get_part2prefixes
pfxlist, acc = get_prefix(policy, plist, pfxlist, participant, sdx)
File "/users/castrofl/pyretic/pyretic/sdx/lib/vnh_assignment.py", line 92, in get_prefix
pfxlist, acc = get_prefix(pol, plist, pfxlist, part, sdx)
File "/users/castrofl/pyretic/pyretic/sdx/lib/vnh_assignment.py", line 112, in get_prefix
acc = bgp_get_announced_routes(sdx, peer)
File "/users/castrofl/pyretic/pyretic/sdx/lib/bgp_interface.py", line 60, in bgp_get_announced_routes
routes = sdx.participants[participant_name].rs_client.get_all_routes('input')
KeyError: ''