[Config] #7644 add tests for passing number looking attributes as strings

| Q                       | A                 |
| -----------------  |:-------------:| 
| Bug fix?            | yes             |
| New feature     | no               |
| BC breaks?     | no               |
| Deprecations?| no               |
| Tests pass?    | yes             |
| Fixed tickets    | #7644        |
| License            | MIT            |