[C++] Adjust the names (script, sample folder, generator) to lang option (#220)

* Rename script: qt5-petstore.sh -> cpp-qt5-petstore.sh

* Rename sample folder: qt5cpp -> cpp-qt5

* Rename script: cpprest-petstore.sh -> cpp-restsdk-petstore.sh

* Rename sample folder: cpprest -> cpp-restsdk

* Rename generator: CppRestClientCodegen -> CppRestSdkClientCodegen

* Rename script: tizen-petstore.sh -> cpp-tizen-petstore.sh

* Rename sample folder: tizen -> cpp-tizen

* Rename script(security): qt5cpp-petstore.sh -> cpp-qt5-petstore.sh

* Rename sample folder(security): qt5cpp -> cpp-qt5

* Rename script(windows): qt5cpp-petstore.bat -> cpp-qt5-petstore.bat

* Change sample folder

* Rename script(windows): cpprest-petstore.bat -> cpp-restsdk-petstore.bat

* Change sample folder

* Rename script(windows): tizen-petstore.bat -> cpp-tizen-petstore.bat

* Change sample folder

* Change output folder: tizen -> cpp-tizen

* Rename the scripts under bin/openapi3

cpp-restsdk is not exist under bin/openapi3

* Change sample folder

samples/client/petstore/cpp-restsdk/JsonBody.cpp

@@ -0,0 +1,36 @@
+/**
+ * OpenAPI Petstore
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * OpenAPI spec version: 1.0.0
+ *
+ * NOTE: This class is auto generated by OpenAPI-Generator 3.0.0-SNAPSHOT.
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+#include "JsonBody.h"
+
+namespace org {
+namespace openapitools {
+namespace client {
+namespace model {
+
+JsonBody::JsonBody( const web::json::value& json)
+    : m_Json(json)
+{
+}
+
+JsonBody::~JsonBody()
+{
+}
+
+void JsonBody::writeTo( std::ostream& target )
+{
+    m_Json.serialize(target);
+}
+
+}
+}
+}
+}