Throw exception in `CsvFileConnector#getIndividualTimeSeriesFilePaths`

[sebastian-peter]

PowerSystemDataModel/src/main/java/edu/ie3/datamodel/io/connectors/CsvFileConnector.java

Lines 251 to 254 in 8baf289

	} catch (IOException e) {
	log.error("Unable to determine time series files readers for time series.", e);
	return Collections.emptySet();
	}

Probably use ConnectorException as above in the same file