1.DiscoveryAggregator - process delta message
2.TesDiscoverAggregator - test delta message processing
3.ObjectsFactory - create list of objects from object type and object
dictionaries
4.DiscoveryMessageConverter - convert discovery message to structured
object
issue: 349224

Change-Id: I13a1791a7c5fb9932e8a62a7338ce989011544dc
Signed-off-by: vadimg <vadimg@mellanox.com>