set skipFormModel to false by default

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java

@@ -466,7 +466,7 @@ public class DefaultGenerator implements Generator {
 
         Boolean skipFormModel = GlobalSettings.getProperty(CodegenConstants.SKIP_FORM_MODEL) != null ?
                 Boolean.valueOf(GlobalSettings.getProperty(CodegenConstants.SKIP_FORM_MODEL)) :
-                getGeneratorPropertyDefaultSwitch(CodegenConstants.SKIP_FORM_MODEL, true);
+                getGeneratorPropertyDefaultSwitch(CodegenConstants.SKIP_FORM_MODEL, false);
 
         // process models only
         for (String name : modelKeys) {
@@ -488,9 +488,9 @@ public class DefaultGenerator implements Generator {
                 if (unusedModels.contains(name)) {
                     if (Boolean.FALSE.equals(skipFormModel)) {
                         // if skipFormModel sets to true, still generate the model and log the result
-                        LOGGER.info("Model {} (marked as unused due to form parameters) is generated due to the global property `skipFormModel` set to false", name);
+                        LOGGER.info("Model {} (marked as unused due to form parameters) is generated due to the global property `skipFormModel` set to false (default)", name);
                     } else {
-                        LOGGER.info("Model {} not generated since it's marked as unused (due to form parameters) and `skipFormModel` (global property) set to true (default)", name);
+                        LOGGER.info("Model {} not generated since it's marked as unused (due to form parameters) and `skipFormModel` (global property) set to true", name);
                         // TODO: Should this be added to dryRun? If not, this seems like a weird place to return early from processing.
                         continue;
                     }