fix relative ref tests, unexpected invocation tests

Author: gracekarina

modules/swagger-codegen/src/main/java/io/swagger/codegen/config/CodegenConfigurator.java

@@ -435,6 +435,7 @@ public ClientOptInput toClientOptInput() {
 
         final List<AuthorizationValue> authorizationValues = AuthParser.parse(auth);
         ParseOptions parseOptions = new ParseOptions();
+        parseOptions.setResolve(true);
         parseOptions.setFlatten(true);
         Swagger swagger = new SwaggerParser().read(inputSpec, authorizationValues, parseOptions);
 

modules/swagger-codegen/src/test/java/io/swagger/codegen/config/CodegenConfiguratorTest.java

@@ -358,6 +358,7 @@ private void setupStandardExpectations(final String spec, final String languageN
             new ParseOptions();
             times = 1;
             result = options;
+            options.setResolve(true);
             options.setFlatten(true);
 
             new SwaggerParser();