Jinja2 templates rendered using Python 3 interpreter, are required
to conform with Python 3 new semantics.
singed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
The -sv2 suffix was used to differentiate SNMP Dockers when we transitioned from "SONiCv1" to "SONiCv2", about four years ago. The old Docker materials were removed long ago; there is no need to keep this suffix. Removing it aligns the name with all the other Dockers.