Fix incorrect counts in tender/numberOfTenderers

[ndrhzn]

I noticed that for some tenders, value of tender/numberOfTenderers can be not equal to count of parties with roles="tenderer" in parties array (or number of tenderers in bids/details)

For instance, in 2017_NHM_2075_1.json we can see tender/numberOfTenderers=6. But if we look into the parties array, we will only find 4 parties where roles="tenderer". And if we take a look at the bids/details, we will only find 4 tenderers.

By my calculations, the issue can affect 8731 releases. I'm not sure what is the cause of the issue, though.

Attaching here table with all the ocids affected so you can investigate it further. numberOfTenderers.csv