Patch 32049 replaced object-oriented wrapped network resources with
python method and object reference mechanism, and relys on
test framework's teardown mechanism.
Partial oo-wrapped mechanism are replaced with methods defined at
module network_addon_methods.py, and object referenc method is
replaced with python dict/list reference methods.
For API tests, their _try_delete_resources are replaced with
test_utils.call_and_ignore_notfound_exc
config.nsxv.no_router_type added to support running lbaasv2
under upstream environment.
Potential issues whith NSX-6.2.3 during this fix:
bug#1682911 and bug#1683241
Change-Id: I93a667b85d87644e8cbf27337c7355b338f67982
3d39f1300c