* Change port index in port_config.ini to 1-based
* Add default port index to port_config.ini, change platform plugins to accept 1-based port index
* fix port index in sfp_event.py
* [device]: Add support for Mellanox MSN2010
MSN2010 runs on Spectrum silicon and has 22 ports:
18 25GbE and 4 100GbE
* [device]: Fix a potential qos config issue for MSN2700
Signed-off-by: Kevin Wang <kevinw@mellanox.com>