Fixing NMS-6108: Can't use SNMPv3 with NoAuth-NoPriv (Part II)

Bamboo has reported some failures. These tests are associated with a
specific use case on snmp-config.xml that was not taken in consideration
by my fix. Now all the tests are passing without issues.
Merge remote-tracking branch 'origin/1.12'
Fixed Linkd Tests
Merge branch 'master' of github.com:OpenNMS/opennms