dto : measures : add utils methods
merge
Merge branch 'sprint' of https://github.com/sleroy/komea into sprint

Conflicts:
	komea-product/komea-dto/src/main/java/org/komea/product/model/timeserie/dto/TimeSerieDTO.java
	komea-product/komea-dto/src/main/java/org/komea/product/service/dto/MeasureResult.java