Database schema update (v8)

[To-om]

The schema of TheHive database must be updated:

• in case entity
  • add owner attribute. Is set to user who created the case by default.
  • remove is IsIncident attribute as this information is now stored in resolutionStatus.
• remove analyzer entity as it is now handled by Cortex
• create reportTemplate entity
• add reports attribute in observable that stores summary of analysis reports
• add order attribute in tasks to order them in the list
• convert date format from ISO to timestamp with milliseconds (cf. issue 7 in elastic4play)
• in user entity
  • add preferences attribute
  • add avatar attribute to support avatar in future release