- Updated tests to check if all tests pass when adding marker - all tests pass

… into add-markers-tom

- updated tests
- corrected version in test_undefined

… into add-markers-tom

a default value so it is not mandatory

… into add-markers-tom

- Needed updating test file for cavities: f -> frequency

lattice

* updated parse to deal with array values
* updated test example
* tested maxiv madx and elegant conversion both worked but result in
different json files

- removed min value from schema for length, SLS has negativ drifts

… into add-markers-tom