Enum schemas aren't generated if the enumerator list matches

I have two JSON schema files, where the type names are different, but the enumerators are matching.
```
{ "title":"firstEnumeration","enum": ["a","b","c"],"type": "string"}
```
```
{ "title":"secondEnumeration","enum": ["a","b","c"],"type": "string"}
```
When I use quicktype to generate source code, I only get output for the `secondEnumeration`, even though they are two different types - there is also no alias type generated for `firstEnumeration`, it is simply an unknown symbol. This problem is observed across multiple output languages, so the logic to blame must be in the JSON schema parsing logic.