Enable event feature on HBase

The purpose of this bp is to implement event feature on HBase

Proposed preliminary structure of Events in HBase:

table:
- events
      - row_key: timestamp of event's generation + uuid of event
                 in format: "%s+%s" % (ts, Event.message_id)
      -Column Families:
          f: contains the following qualifiers:
              -event_type: description of event's type
              -timestamp: time stamp of event generation
              -all traits for this event in format
               "%s+%s" % (trait_name, trait_type)

Structure that is proposed will support next queries:
- event’s generation time
- event id
- event type
- trait: id, description, type