Fix integration tests

Add the `failOnUnknownProperties: true` additional properties to generate the
expected mapper

Author: fistons

bin/configs/java-jersey2-8.yaml

@@ -11,3 +11,4 @@ additionalProperties:
   useOneOfDiscriminatorLookup: true
   disallowAdditionalPropertiesIfNotPresent: false
   gradleProperties: "\n# JVM arguments\norg.gradle.jvmargs=-Xmx2024m -XX:MaxPermSize=512m\n# set timeout\norg.gradle.daemon.idletimeout=3600000\n# show all warnings\norg.gradle.warning.mode=all"
+  failOnUnknownProperties: true

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/JSON.java

@@ -23,7 +23,7 @@ public JSON() {
     mapper = JsonMapper.builder()
             .serializationInclusion(JsonInclude.Include.NON_NULL)
             .configure(MapperFeature.ALLOW_COERCION_OF_SCALARS, false)
-            .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+            .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true)
             .configure(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE, true)
             .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
             .enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)