- update    parse()   @ InterfaceCounter.py
- update    compose() @ NetworkInstance.py
- update    compose() @ NetworkInstanceInterface.py
- implement parse()   @ NetworkInstanceInterface.py
- update    compose() @ NetworkInstanceStaticRoute.py
- implement parse()   @ NetworkInstanceStaticRoute.py
- Fix MonitoringThread.py


there is an error removing static routes that makes unitary tests to crash
uncomment commented check_config_network_instance and validate

- implement L2 VPN with BGP
- implement L3 VPN with BGP
- test static routes with ping
