Added username to history API so that per-user history settings can be
preserved. Made the SavedHistory object serializable with JAXB. Added
the BundleContextHistoryManager which will serialize history snapshots
into the bundle context.
Added selection state serialization to the saved history.
Fixed broken enhanced lldp tests

Added a new methid to create links inside
the LldpRemRow class
More work on testing equals on topology objects
Merge branch 'master' into features/linkd-scalability