Add TAPD as our data source

[klesh]

Description

TAPD is used by many of our customer, it should be supported.

Describe the solution you'd like

Develop a plugin to import data from TAPD

Has the Feature been Requested Before?

Yes

[klesh]

Can we reach out to some real TaPD users and try to collect their actual data? @Startrekzky

[klesh]

@Startrekzky : mock data on our own.

[warren830]

1. Rate limit problem
   The doc of tapd said the rate limit is 6000req/10min, but when we are using this rate limit to send requests, we got error like below:
   [{"status":429,"data":"","info":"To many requests, api account xxxxxx! max request rates is 1800req/10min"}]

2. Status mapping problem
   In the tapd platform, we can set one status to be initial status, but we can't get this information(which status is initial) from api request.

[warren830]

3. Changelog Item problem

   "field": "secret_root_id",
   "field_label": "可访问范围",
   "value_after": {
   "allow_list": "x",
   "secret_root_id": "xxxxx",
   "participant_fields": 1
   },
   "value_before": {
   "allow_list": "",
   "secret_root_id": 0,
   "participant_fields": 0
   },
   "secret_root_id": "xxx",
   "value_after_parsed": {
   "allow_list": "xxxx;xxx",
   "secret_root_id": "xxx",
   "participant_fields": "1"
   },
   "value_before_parsed": {
   "allow_list": "",
   "secret_root_id": "0",
   "participant_fields": "0"
   }
   }
   sometimes the field value_%_parsed is json, sometimes it's a string...