[Validators] Fixed failing tests requiring ICU 52.1 which are skipped otherwise

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

I just ran the tests with ICU 52.1 installed and noticed that a few of them failed. This PR fixes these tests.