Fixes #4971: Do not use the group 'nogroup' in tests (not here everywhere)
Merge pull request #154 from Kegeruneku/bug_4971/dev/4971_correct_test_on_el_due_to_missing_group

Fixes #4971: Do not use the group 'nogroup' in tests (not here everywher...
Fixes #5901: Implementation of #5448 normal ordering test
Merge pull request #153 from peckpeck/int_5901/implementation_of_5448_normal_ordering_test

Fixes #5901: Implementation of #5448 normal ordering test
Fixes #5929: nbsp test is failing in ncf because it checks to many files
Merge pull request #156 from jooooooon/bug_5929/nbsp_test_is_failing_in_ncf_because_it_checks_to_many_files

Fixes #5929: nbsp test is failing in ncf because it checks to many files