CreateInputsModel: Don't allow ungauged donor

In case of user defined donor, this one should not be Ungauged otherwise airGR::CreateInputsModel will crash on FUN_MOD=Ungauged is not a function

changed milestone to %v0.7.0

added enhancement feature labels

assigned to @david.dorchies

created branch 131-createinputsmodel-don-t-allow-ungauged-donor to address this issue

mentioned in merge request !97 (merged)

mentioned in commit 57ff61e0

mentioned in commit 0652f513

closed via merge request !97 (merged)