- Introduced sensor type specific aggregation logic in DataAggregationDeamon (sum/avg)
- Renamed TimeConstants class to TimeUtility.
- DataAggregationDeamon::getTimestampPeriodStart did not calculate days correctly.
- Moved getTimestampPeriodStart to TimeUtility class.
Former-commit-id: c3db0dba990f1091b249fcdd4b5c3e78999cd456