add influxdb write loop test script.

fix influxdbTest timeout error.

[TD-1051]

Feature/sangshuduo/perftest script improve

Merge branch 'feature/sangshuduo/perftest-script-improve' of https://github.com/taosdata/TDengine into feature/sangshuduo/perftest-script-improve

if redirect does not include Ep List, treat it as NOT_READY

fix hard code ip in query code.

Merge branch 'feature/sangshuduo/perftest-script-improve' of https://github.com/taosdata/TDengine into feature/sangshuduo/perftest-script-improve

Feature/os

Bugfix/td 1089

[td-225] fix memory leak

including:
* server side crash
* client side crash
* server side memory leak

update broken link in documentation