add validation of generated AnDO structure

[JuliaSprenger]

After creation of an AnDO structure, the AnDOChecker should be run to validate the structure

[JuliaSprenger]

should be already included by https://github.com/INT-NIT/DigLab2AnDO/blob/a7fdb228f2b3a55552a74ede45f4879b1a933b69/diglab2ando.py#L140

[JuliaSprenger]

This needs to be completed after INT-NIT/BEP032tools#87 is completed