Pyats reverse

NORMALIZED		PYATS
bigip_f5	→	bigip
cisco_asa	→	asa
cisco_dnac	→	dnac
cisco_ios	→	iosxe
cisco_nxos	→	nxos
cisco_viptella	→	viptela
cisco_xe	→	iosxe
cisco_xr	→	iosxr
juniper_junos	→	junos
linux	→	linux
nokia_sros	→	sros