MIKE SHE hotfix 01-08-2019

This hotfix corrects an error in the preprocessing of a coupled  MIKE SHE - MIKE HYDRO River model. The problem arises for MIKE SHE models linked to a complex river network with several bifurcations and confluences, for which the branches are not connected correctly in MIKE SHE, and this leads to incorrect numerical results in the coupling simulation, especially in the discharges between the MIKE SHE and the river model.