Fix problems with first period commutation on artisan 1.

Add financials spreadsheet tests for artisan 2.
PMO-2426: global default parameters adjusted
PMO-2427: relabeling output paths
PMO-2435: available occurrence distributions restricted and parm new labeled
PMO-2353: validators and value conversion functions adjusted to avoid application crashes
releasing new plugin version 0.6.25-kti
PMO-2474: keep original claim if there is no corresponding benefit claim
PMO-2470: use correct base and key claim when merging
releasing new plugin version 0.6.26-kti
fix core plugin version
PMO-2478 : clear baseClaimByKeyClaim map during reset
Merge branch '1.6.x' of github.com:pillarone/risk-analytics-pc-cashflow into 1.6.x
new pc-cashflow plugin version
PMO-2478: map needs to be cleared before every iteration. Additional work was needed in order to inject the periodScope correctly.
PMO-2480: removed overwritting of getProperties() as it is sufficient ot overwrite getAllSubComponents()
releasing new plugin version 0.6.28-kti
PMO-2353: fix NPE for void cumulative patterns
PMO-2486: include split by reserves
merging 1.6.x to master branch