Ohara: Flatten cluster settings to the first level

[eechih]

將物件的 settings 資料，攤平到物件的第一層，可以直接享受 Patch Update 的好處。
受影響的物件有 Zookeeper, Broker, Worker, Topic, Connector。

感謝 @chia7712

1. 
   
   • [x] flatter cluster settings and keep the deprecated "settings" (#3581) (@chia7712)
   
   
2. 
   
   • [x] remove "settings" from all json response (@chia7712) (#3647)
   
   
3. 
   
   • [x] [Manager] removing "settings" in all api tests (@saivirtue) (#3646)
   
   
4. • ~[ ] [Manager] apply flatten settings to api and refactor cluster api functions (@saivirtue) (#3598)~
     
     
     

   This change will be applied to the following objects:

   1. 
      
      • zookeeper
      
      
   2. 
      
      • broker
      
      
   3. 
      
      • worker
      
      
   4. 
      
      • stream
      
      
   5. 
      
      • topic
      
      
   6. 
      
      • connector
      
      
   7. 
      
      • workspace
      
      

   The basic supported APIs:

   1. get: fetch data & get from object api
   2. getAll: fetch data list & get from object api
   3. create: create data & save to object api
   4. update: update data
   5. stage: update object api
   6. delete: delete data & object api
   7. start: start service
   8. stop: stop service

   Response data:

   {
    "settings": {
    },
    "stagingSettings":{
    },
    "settingDefinitions":[
    ],
    "other_runtime_fields"
   }
   

   
   
   

[chia7712]

@eechih great idea :)

[saivirtue]

@oharastream/frontend
Please see the description of sub-task 3 for the conclusion.
Let me know if I was misunderstanding something :)

[chia7712]

@oharastream/frontend I fail to catch the progress of removing the "settings". Is it a good time to remove the "settings"?

[saivirtue]

@oharastream/frontend I fail to catch the progress of removing the "settings". Is it a good time to remove the "settings"?

Ongoing. Will fire a PR in late today.

[saivirtue]

ping @chia7712
Front-end is ready to accept no settings world, you can remove it :)

[chia7712]

all tasks are completed :)