[core] Initial FeatureSet structures and definitions (#3614)

[core] Initial FeatureSet structures and definitions
Add default feature set to DefaultCodegen
Initial FeatureSet definitions for:

*  ada 
*  android 
*  apache2 
*  asciidoc 
*  aspnetcore 
*  avro 
*  bash 
*  c 
*  clojure 
*  cpp-pistache-server 
*  cpp-qt5-client 
*  cpp-qt5-qhttpengine-server 
*  cpp-restbed-server 
*  cpp-restsdk 
*  cpp-tizen 
*  csharp 
*  csharp-nancyfx 
*  csharp-netcore 
*  cwiki 
*  dart 
*  eiffel 
*  elixir 
*  elm 
*  erlang 
*  flash 
*  fsharp-functions 
*  go  Client/Server
*  graphql-nodejs-express-server 
*  graphql-schema 
*  groovy 
*  haskell 
*  haskell-http-client 
*  java 
*  jmeter 
*  kotlin 
*  kotlin vertx 
*  kotlin-server 
*  kotlin-spring 
*  lua 
*  mysql 
*  nim 
*  nodejs 
*  nodejs-express 
*  objc 
*  ocaml 
*  openapi 
*  openapi-yaml 
*  perl 
*  php 
*  php-laravel 
*  php-lumen 
*  php-silex 
*  php-slim 
*  php-symfony 
*  php-ze-ph 
*  powershell 
*  protobuf 
*  protobuf-schema 
*  python 
*  python-aiohttp 
*  python-blueplanet 
*  python-experimental 
*  r 
*  ror 
*  ruby 
*  ruby 
*  ruby-sinatra 
*  rust 
*  scala-akka 
*  scala-finch 
*  scala-gatling 
*  scala-http-client 
*  scala-lagom 
*  scala-play 
*  scalatra 
*  scalaz 
*  spring 
*  static docs 
*  swift 
*  typescript

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApi.java

@@ -190,8 +190,8 @@ public interface FakeApi {
 
 
     /**
-     * POST /fake : Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
-     * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
+     * POST /fake : Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+     * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
      *
      * @param number None (required)
      * @param _double None (required)
@@ -210,7 +210,7 @@ public interface FakeApi {
      * @return Invalid username supplied (status code 400)
      *         or User not found (status code 404)
      */
-    @ApiOperation(value = "Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 ", nickname = "testEndpointParameters", notes = "Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 ", authorizations = {
+    @ApiOperation(value = "Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트", nickname = "testEndpointParameters", notes = "Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트", authorizations = {
         @Authorization(value = "http_basic_test")
     }, tags={ "fake", })
     @ApiResponses(value = { 

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApiDelegate.java

@@ -180,8 +180,8 @@ public interface FakeApiDelegate {
     }
 
     /**
-     * POST /fake : Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
-     * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
+     * POST /fake : Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+     * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
      *
      * @param number None (required)
      * @param _double None (required)

samples/server/petstore/springboot-reactive/src/main/resources/openapi.yaml

@@ -862,11 +862,11 @@ paths:
       x-tags:
       - tag: fake
     post:
-      description: |
+      description: |-
         Fake endpoint for testing various parameters
-        假端點
-        偽のエンドポイント
-        가짜 엔드 포인트
+         假端點
+         偽のエンドポイント
+         가짜 엔드 포인트
       operationId: testEndpointParameters
       requestBody:
         content:
@@ -953,11 +953,11 @@ paths:
           description: User not found
       security:
       - http_basic_test: []
-      summary: |
+      summary: |-
         Fake endpoint for testing various parameters
-        假端點
-        偽のエンドポイント
-        가짜 엔드 포인트
+         假端點
+         偽のエンドポイント
+         가짜 엔드 포인트
       tags:
       - fake
       x-contentType: application/x-www-form-urlencoded