Minion requires location-specific definitions in SNMP config

If I set SNMP parameters for a given address or range and do not specify a location, I expect all Minions to fall back to those parameters unless serving a monitoring-location for which a location-specific definition exists. Instead, if no definition exists for the area served, Minion uses the global default (what's in the top-level <snmp-config> element of snmp-config.xml).

For example, on a system where no location-tied SNMP config definitions exist, I get the expected config when requesting it with no location specified:

opennms> snmp:show-config 172.22.160.199
Address: 172.22.160.199
ProxyForAddress: null
Port: 161
Timeout: 1800
Retries: 1800
MaxVarsPerPdu: 10
MaxRepetitions: 2
MaxRequestSize: 65535
Version: v2c
ReadCommunity: TheActualRightOne
WriteCommunity: private

But when requesting SNMP config for a location that exists, I don't get what I expect:

opennms> snmp:show-config -l USNN 172.22.160.199
Address: 172.22.160.199
ProxyForAddress: null
Port: 161
Timeout: 1800
Retries: 1800
MaxVarsPerPdu: 10
MaxRepetitions: 2
MaxRequestSize: 65535
Version: v2c
ReadCommunity: public
WriteCommunity: private