* restore .gitmodules for 2.0

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

This reverts commit 9d342bf3f5b404fc1014400060e012b387bfdb8c.

* immigarate file change from stand-alone repo to TDengine

for 2.0

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

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

for 2.0

* add Jenkinsfile2
Co-authored-by: Ntangfangzhi <fztang@taosdata.com>

Bumps [c3p0](https://github.com/swaldman/c3p0) from 0.9.5.2 to 0.9.5.4.
- [Release notes](https://github.com/swaldman/c3p0/releases)
- [Commits](https://github.com/swaldman/c3p0/compare/c3p0-0.9.5.2...c3p0-0.9.5.4)
Signed-off-by: Ndependabot[bot] <support@github.com>