Use the latest jsonschema2pojo to fix an issue with schema names

I had an issue using the raml-jaxrs-codegen plugin that I traced down to the jsonschema2pojo creating the pojo with a name that didn't reflect what the rest of the code generation was expecting, so the generated code wouldn't compile. 

There was a comment in the code about returning the actual generated type once https://github.com/joelittlejohn/jsonschema2pojo/issues/137  was fixed - that issue has been fixed in 0.4.1 of org.jsonschema2pojo

This pull request uses that fixed version of jsonschema2pojo to fix the issue that I am experiencing.