fix release detection in junos backend and have it be slightly less loggy
fix release detection in junos backend and have it be slightly less loggy

jeroenh/OpenNSA,jab1982/opennsa,jeroenh/OpenNSA,NORDUnet/opennsa,jab1982/opennsa,NORDUnet/opennsa,jeroenh/OpenNSA,NORDUnet/opennsa