now AuditController can listAudit with paginator through a post method.
userListById added to UserAPI
missing token check
commented authChecker

Merge branch 'feature/Audit' of https://gitlab.fing.edu.uy/julieta.dubra/repp_backend into feature/Audit

getDefaultWeights/ExtraData are now GET instead of POST.
updateParameterValue has changed the way it receives parameters, see swagger documentation, which has been updated.
 (fefo you have been warned)

default extra data model has been changed to allow bigger values.
updateEquationConstants was split into 3 functions, to accomodate each possible parameter type.
an error is now returned if no rows are affected by an update.

Validator now performs more checks, removed those checks from other code to make it simpler

Also updates some error messages and environment variables