Java 8 compile fix

Compilation with Java 8 had failed:

    [ERROR] /D:/dev/rest-docs/swagger-core/modules/swagger-jaxrs/src/main/java/com/wordnik/swagger/jaxrs/Reader.java:[322,9] reference to Parameter is ambiguous
    [ERROR] both class java.lang.reflect.Parameter in java.lang.reflect and interface com.wordnik.swagger.models.parameters.Parameter in com.wordnik.swagger.models.parameters match