Reworked BridgeTopology

The bridge topology class has been improved
All the test for linkd are fixed
Fixed Failing Test do to SNMP_IP
Reworked BridgeTopology class with tests
Refactored BridgeTopology: better logging
Added checklink to Nms4930 linkd tests
iAdded check for null TopologyCandidate
Bridge Topology: introduced two new conditions

This is another step into the bridge discovery
algoritm implemneted using the BridgeTopology class.
Need to run more tests.
Reworked Bridge Topology class and tests

There are failing tests that must be fixed
The problem is that the alg is not working for more then two device
Added consolidatidation of links to BridgeTopology

The li nks are discovered step by step
bump to better-working features generator plugin
Rebuild new tests for BridgeTopology

Still failures
Merge branch 'space/14.1-enlinkd' of github.com:OpenNMS/opennms into space/14.1-enlinkd
Fixed Nms4930Test

The BridgeTpology class order the
bridge links using the nodeid
Fixed BridgeTopology

Found the condition under which a link is found
Added a method to add the current topology
Renamed NodeDiscovery classes

Theenhanced linkd Node discovery classes
have been renamed
Reworked NodeDisvoeryBridge

There was an error with the Vtp vlan
the bridge was not walked if the vtp is not active
Added Better logging
Added targets to addTopology

In this way you have the ability to properly add the topology as was found
Implemented the store for Bridge Discovery

The EnhancedLinkd service has been changed
to fully support the Bridge Discovery Algoritm and
to persist data into the database
Removed unused imports