allowing query separators to be a substring of a label key

[evyaffe]

Pull Request Template

Motivation

When querying the DB using labelQuery for landscape_label the request fail because 'and' is considered a separator and is contained in landscape as a substring

Approach

The change is in the validation - we check for 'and' as a standalone word

Pull Request status

• [x] Initial implementation
• [ ] Refactoring
• [ ] Unit tests
• [ ] Integration tests