[PLAT-5853] Changes for overnight index and OIS.
[PLAT-5853] Changed converters for AA overnight.
[PLAT-5853] Change related to overnight indexes.
[PLAT-5853] Changes for FedFund futures.
[PLAT-5853] Change node converter to use Ibor index.
[PLAT-5853] Changed converters for Ibor related products.
[PLAT-5853] Adding a test on FRA.