Fix behaviour for (product or feed inventory?) TimeSeries

[maxschalz]

The following lines indicate how much feed is present in the enrichment's feed ivnentory.
However, they add that information to a potentially wrong timeseries.

flexicamore/src/enrichment.cc

Lines 226 to 228 in ba95e55

	for (int i = 0; i < feed_commods.size(); ++i) {
	RecordTimeSeries<double>("supply" + feed_commods[i], this,
	feed_inv[i].quantity());

One possibility to fix this would be to add a pre- or suffix to the TimeSeries name, to get something like this

 for (int i = 0; i < feed_commods.size(); ++i) { 
   RecordTimeSeries<double>("supply" + feed_commods[i] + "feed_inv",
                            this, feed_inv[i].quantity());