Merge pull request #407 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-466-update-vehicle-loadings to develop

* commit '1a99570e':
  remove unnecessary parameter for computing payload, adapt testcase due to changed simulation runs (no full-load any more)
  adapt xml writer to changes in schema
  update payload10% computation: use separate lookup, make pc-formula in segment table more explicit, i.e. use pc50 or pc75 instead and map to according lookup
  updating segment table: add payloads for 'low loaded vehicle', update payloads for municipal, construction cycles