Added security and versioning of the Products. Also made many changes through out the code
Merge branch 'dev' of https://github.com/k-int/Optician2020-minifactories into dev

Conflicts:
	o2020/grails-app/domain/com/k_int/miniFactory/storageUnit/Product.groovy
	o2020/test/unit/o2020/ApiServiceSpec.groovy