[BUG] Failure to build master branch due to a failling test

Created by: cvgaviao

I have cloned the openapi-generator today in order to test it with a snapshot version of swagger-parser containing a patch to an issue that bitten my spec file: https://github.com/swagger-api/swagger-parser/issues/1063

So, I have changed the swagger-parser version in the master pom and tried to build.

But I'm getting a failure in this test class: org.openapitools.codegen.java.JavaModelTest on both maven or eclipse testng run:

org.openapitools.codegen.SpecValidationException: There were issues with the specification. The option can be disabled via validateSpec (Maven/Gradle) or --skip-validate-spec (CLI).
 | Error count: 1, Warning count: 0
Errors: 
	-attribute paths.'/pet/findByStatus'(get).parameters.[status].schemas.default is not of type `array`

	at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:615)
	at org.openapitools.codegen.java.JavaModelTest.generateModel(JavaModelTest.java:1230)