- Added test models for incomplete media in ModelicaTest.Media.TestAllProperties.IncompleteMedia,
  in order to test all least all functions that are supported.
- Improved the error message of the nonlinear solver

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@6845 7ce873d0-865f-4ce7-a662-4bb36ea78beb