validate_with_model(): No type checks if in ignore
Bugfix: software_requirements in outer scope
No cover for internal sanity test

Condition can not easily be triggered from a unit test
Columns in single job POST reply same as in GET
Clarify error message, end can be == start

End is allowed to be equal to start, this will result in exactly one
task.
Fix testing types in single job POST
More tests for jobs api