Total part for high filters is the sum of parts

We use formula on all questionnaires when importing to define this
new rule. Also we introduce a new formula syntax {self} to be able
to chain formulas (because if both parts are not available, then
we fallback on standard total formula, or non-formulat result).
Enable fixed point float results and tests

Unit tests are now capable of fixed point float comparaison for JSON
file. This avoids all float point precision issues.
Update composer and vendors
Alternate Filters were not imported if already existing in another Questionnaire

This lead to wrong Estimates values because the alternate filters could not be found.
Which, in turn, lead to wrong 'Total improved' almost systemically