fix request body test for updated parser version

Author: frantuma

src/test/java/io/swagger/codegen/v3/generators/scala/AkkaHttpServerCodegenTest.java

@@ -259,7 +259,7 @@ public void testFileGeneration() throws IOException {
         Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/api/UserApi.scala").exists());
 
         Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/model/ApiResponse.scala").exists());
-        Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/model/Body.scala").exists());
+        Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/model/Pet_petId_body.scala").exists());
         Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/model/Category.scala").exists());
         Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/model/Order.scala").exists());
         Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/model/Pet.scala").exists());
@@ -269,4 +269,4 @@ public void testFileGeneration() throws IOException {
         Assert.assertTrue(new File(output, "src/main/scala/io/swagger/server/model/User.scala").exists());
         folder.delete();
     }
-}
+}