SeriesService.findByCollectionId(): rename to CollectionService.findSeriesInCollection()

[0pdd]

The puzzle 477-71df5fd9 from #477 has to be resolved:

mystamps/src/main/java/ru/mystamps/web/service/SeriesService.java

Lines 56 to 57 in 4cb3692

	// @todo #477 SeriesService.findByCollectionId():
	// rename to CollectionService.findSeriesInCollection()

The puzzle was created by Slava Semushin on 13-Jun-18.