* Update avaya-vsp.yaml
Extreme purchased the Avaya network assets and so I need to rebrand the VSP to be Extreme. I am changing the icon to be Extreme. I am also adding support for the 8404c which is sysObjectID .1.3.6.1.4.1.2272.220
* Create avaya-vsp_8404c.snmprec
need to add a new vsp 8404c chassis support for avaya/extreme
* Added generated json file
* Udated test files