Update context.proto introducing slice isolation, tenancy

  repeated ServiceId slice_service_ids = 4;

  repeated SliceId slice_subslice_ids = 5;

  SliceStatus slice_status = 6;

  SliceOwner slice_owner = 7;

}

message SliceOwner {

  Uuid owner_uuid = 1;

  string owner_string = 2;

}

enum SliceStatusEnum {

  bool all_active = 2;

}

enum IsolationLevelEnum {

  NO_ISOLATION = 0;

  PHYSICAL_ISOLATION = 1;

  LOGICAL_ISOLATION = 2;

  PROCESS_ISOLATION = 3;

  PHYSICAL_MEMORY_ISOLATION = 4;

  PHYSICAL_NETWORK_ISOLATION = 5;

  VIRTUAL_RESOURCE_ISOLATION = 6;

  NETWORK_FUNCTIONS_ISOLATION = 7;

  SERVICE_ISOLATION = 8;

}

message Constraint_SLA_Isolation_level {

  IsolationLevelEnum isolation_level = 1;

}

message Constraint {

  oneof constraint {

    Constraint_Custom custom = 1;

    Constraint_SLA_Capacity sla_capacity = 4;

    Constraint_SLA_Latency sla_latency = 5;

    Constraint_SLA_Availability sla_availability = 6;

    Constraint_SLA_Isolation_level = 7;

  }

}