[PLAT-5006] Support same key used for different labels (e.g. 12M/1Y)
[PLAT-5006] Add merged outputs multi-currency swap view to Bloomberg examples
[PLAT-5006] Checkstyle
[PLAT-5006] Support aggregation with missing inputs
[PLAT-5006] Serialisation of DoubleCurrencyLabelledMatrix2D