Issue31 lom validation
Except Test Case 3,4,6,7 and 11, all Cases show now good results. As we
- deleted some old redundant models and thereby improved current models
- got rid of cardinality in LOM
- changed .Streams to asserts and revised naming
I propose to merge this branch and open a new one for improving the remaining Test Cases As I need to reassure that my student did not work on this branch since his last commit, please don't delete the branch.