Made a change to avoid calling _httpResponse.Content.ReadAsStringAsync() and deserialize from the content stream. (#731)

* Avoid calling _httpResponse.Content.ReadAsStringAsync() and deserialize from the content stream

Made a change to avoid calling _httpResponse.Content.ReadAsStringAsync() and deserialize from the content stream, which significantly reduced memory utilization.
Created Kubernetes.cs file and moved constructors and couple methods from the Kubernetes.cs.template to the Kubernetes.cs

Generated Kubernetes.cs will be in a separate commit.

* Separate commit for generated Kubernetes.cs

Author: VladimirKhvostov

gen/KubernetesGenerator/ParamHelper.cs

@@ -19,11 +19,12 @@ public ParamHelper(GeneralNameHelper generalNameHelper, TypeHelper typeHelper)
 
         public void RegisterHelper()
         {
-            Helpers.Register(nameof(IfParamCotains), IfParamCotains);
+            Helpers.Register(nameof(IfParamContains), IfParamContains);
+            Helpers.Register(nameof(IfParamDoesNotContain), IfParamDoesNotContain);
             Helpers.Register(nameof(GetModelCtorParam), GetModelCtorParam);
         }
 
-        public static void IfParamCotains(RenderContext context, IList<object> arguments,
+        public static void IfParamContains(RenderContext context, IList<object> arguments,
             IDictionary<string, object> options,
             RenderBlock fn, RenderBlock inverse)
         {
@@ -54,6 +55,36 @@ public static void IfParamCotains(RenderContext context, IList<object> arguments
             }
         }
 
+        public static void IfParamDoesNotContain(RenderContext context, IList<object> arguments,
+            IDictionary<string, object> options,
+            RenderBlock fn, RenderBlock inverse)
+        {
+            var operation = arguments?.FirstOrDefault() as SwaggerOperation;
+            if (operation != null)
+            {
+                string name = null;
+                if (arguments.Count > 1)
+                {
+                    name = arguments[1] as string;
+                }
+
+                var found = false;
+
+                foreach (var param in operation.Parameters)
+                {
+                    if (param.Name == name)
+                    {
+                        found = true;
+                        break;
+                    }
+                }
+
+                if (!found)
+                {
+                    fn(null);
+                }
+            }
+        }
 
         public void GetModelCtorParam(RenderContext context, IList<object> arguments,
             IDictionary<string, object> options,

gen/KubernetesGenerator/TypeHelper.cs

@@ -306,7 +306,7 @@ public void IfReturnType(RenderContext context, IList<object> arguments,
                 {
                     fn(null);
                 }
-                else if (type.ToLower() == rt.ToLower())
+                else if (string.Equals(type, rt.ToLower(), StringComparison.OrdinalIgnoreCase))
                 {
                     fn(null);
                 }