[TD-4366] adding more ntp. try to make sure ntp is turned on

[TD-4608] <TEST> add test case for stmt error

[TD-4671]<fix>: mark dropped dnode in dnodeCfg.json & exit early when…

[TD-4598]<enhance>: refactored mapping of TD error code to HTTP error code

Feature/query

[TD-4721]<fix>: NULL column in a row was specially processed

sync from develop to master

[TD-2639] <docs>: fix word "MATLAB" spelling.

Docs/update latest feature

[TD-3178]: compact db

[TD-4681]<fix>: return invalid operator for not equal on primary ts column

[TD-4681]<fix>: return invalid operation for not equal on primary ts

[TD-4693]add sql check for develop

[TD-4697]change assert to err msg

[TD-4720]add subquery check for master

[TD-4720]add subquery check

[TD-4682]<fix>: not move vnode to new dnode within 2 seconds

Update fulltest.sh

[TD-4693]add null pointer check