Merge pull request #8801 from swagger-api/bump-codegen-v2

bump codegen v2 to 2.4.0-SNAPSHOT

Author: frantuma

modules/swagger-codegen/pom.xml

@@ -200,7 +200,7 @@
     </reporting>
     <properties>
         <diffutils-version>1.3.0</diffutils-version>
-        <swagger-codegen-v2-version>2.3.1</swagger-codegen-v2-version>
+        <swagger-codegen-v2-version>2.4.0-SNAPSHOT</swagger-codegen-v2-version>
     </properties>
     <dependencies>
         <dependency>