SeriesImportServiceImpl.saveParsedData(): add unit test for alternative price and currency

[0pdd]

The puzzle 1230-9685721f from #1230 has to be resolved:

mystamps/src/main/java/ru/mystamps/web/feature/series/importing/SeriesImportServiceImpl.java

Lines 224 to 225 in fea5123

	// @todo #1230 SeriesImportServiceImpl.saveParsedData():
	// add unit test for alternative price and currency

The puzzle was created by Slava Semushin on 08-Mar-20.