Too Extensive several MBs [INFO] logs from yang-parser-impl during shutdown

The attached 1 MB log, taken from a netvirt/vpnservice/distribution/karaf/target/assembly/data/log/ after a Ctrl-D in a non-SFT real Karaf is a small piece of what I'm starting to understand is a more general topic than the particular message raised in MDSAL-235 ...

... yang-parser-impl spews several MBs of INFO logs during shutdown.

This kind of log has no real value IMHO, and is only confusing - we should see if we can suppress that, or even simply make all those kind of logs debug instead of INFO during shutdown?