* restore .gitmodules

* Revert "[TD-13408]<test>: move tests directory out"

This reverts commit 7db7bd9337cedc4cd0e3f3b16618b97d09791eaa.

* revert to make tests back

* immigrate file change in stand-alone repo to TDengine

* remove tests repository checkout
Co-authored-by: Ntangfangzhi <fztang@taosdata.com>

* [TD-13408]<test>: move tests directory out

* restore Jenkinsfile due to tests dir removal

* add --remote parameter to git submodule update

* git reset hard before checkout to branch

* call git submodule update for some submodules

* remove tests directory before checkout due to conflict

* as all branches remove tests, no need to remove it in script
Co-authored-by: Ntangfangzhi <fztang@taosdata.com>

* Get accurate reason when a query is not executed sucessfully. Disable test case for async query in lua51 connector.

* Add a build option to disable embedded lua lib. By default enable.

* Restore default dependency for module query to avoid compile error on windows.

* Add support for async query. Only insert result is parsed.

* Add support for connection pool.

* Add one case for lua connector in smoke test case list.

* Build dymanic library for lua connector before smoke test.

* Set value for std with c99 to avoid compile error on CentOS7.

* Get parameter from stack by same sequence.

* Add performance test.

Connector is implemented by lua51 but luajit and ffi are not included. Connection pool is not implemented yet. It is a raw demonstration at present and not verified on production environment.