[General] fix InlineModelResolver's logic and use openapi-generator's InlineModelResolver, so that nested "required" works correctly (#1200)

* fix InlineModelResolver's logis and use openapi-generator's InlineModelResolver, so that nested "required" works correctly

* add "required" to nested model schema

* update ensure-up-to-date to include openapi v3's jaxrs

* change test required field

* fix sample shell script, hide timestamp

* fix NPE

* move test case to petstore-with-fake-endpoints-models-for-testing.yaml

* fix jaxrs-jersey (oas3) example generate shell script to use petstore-with-fake-endpoints-models-for-testing.yaml

* add default value

* re-generate samples

samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Model.hs

@@ -505,7 +505,7 @@ mkCat catClassName =
 -- | Category
 data Category = Category
   { categoryId :: !(Maybe Integer) -- ^ "id"
-  , categoryName :: !(Maybe Text) -- ^ "name"
+  , categoryName :: !(Text) -- ^ /Required/ "name"
   } deriving (P.Show, P.Eq, P.Typeable)
 
 -- | FromJSON Category
@@ -513,7 +513,7 @@ instance A.FromJSON Category where
   parseJSON = A.withObject "Category" $ \o ->
     Category
       <$> (o .:? "id")
-      <*> (o .:? "name")
+      <*> (o .:  "name")
 
 -- | ToJSON Category
 instance A.ToJSON Category where
@@ -526,11 +526,12 @@ instance A.ToJSON Category where
 
 -- | Construct a value of type 'Category' (by applying it's required fields, if any)
 mkCategory
-  :: Category
-mkCategory =
+  :: Text -- ^ 'categoryName' 
+  -> Category
+mkCategory categoryName =
   Category
   { categoryId = Nothing
-  , categoryName = Nothing
+  , categoryName
   }
 
 -- ** ClassModel

samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/ModelLens.hs

@@ -185,7 +185,7 @@ categoryIdL f Category{..} = (\categoryId -> Category { categoryId, ..} ) <$> f
 {-# INLINE categoryIdL #-}
 
 -- | 'categoryName' Lens
-categoryNameL :: Lens_' Category (Maybe Text)
+categoryNameL :: Lens_' Category (Text)
 categoryNameL f Category{..} = (\categoryName -> Category { categoryName, ..} ) <$> f categoryName
 {-# INLINE categoryNameL #-}