Add LMove command

[torwig]

• LMove is able to operate on a single list if the source and destination are the same
• In the case of two lists LMove acquires two locks and performs Pop and Push atomically

I wrote only unit tests because I'm not currently familiar with TCL.

[git-hulk]

Thanks @torwig.

No worry, I can add test cases before merging.

[torwig]

@git-hulk Could you please explain a little, why did the job [lint-build-test-on-ubuntu (ubuntu-18.04)] fail? There are some issues with TCL tests. However, I didn't add anything to them, except increase the number of commands.

[git-hulk]

@git-hulk Could you please explain a little, why did the job [lint-build-test-on-ubuntu (ubuntu-18.04)] fail? There are some issues with TCL tests. However, I didn't add anything to them, except increase the number of commands.

@torwig Yes, the failure was NOT related with this PR. The root cause some test cases would fail occasionally when the CI environment become slowly. We have expected to find out those and fix them.

[git-hulk]

@torwig I submitted the test case PR to your repository, you can have a look and merge into your branch if it's ok. torwig#1

[torwig]

@git-hulk Thank you. I merged your commit into my branch.

[git-hulk]

OK, thanks. Will have a look soon.

[git-hulk]

Good unit test coverage, thanks @torwig 👍

[ShooterIT]

cool, i ever wanted to add multi lock, but no action, thanks

[ShooterIT]

one problem i need to confirm is that this command may not adapt slot migration, we should handle it in batch_extractor.cc

cc @ChrisZMF

[git-hulk]

one problem i need to confirm is that this command may not adapt slot migration, we should handle it in batch_extractor.cc

cc @ChrisZMF

@ShooterIT Do you think is it a good idea to separate commands between Kvrocks and Kvrocks2Redis? Or we can do this in the next PR.

[ShooterIT]

@ShooterIT Do you think is it a good idea to separate commands between Kvrocks and Kvrocks2Redis? Or we can do this in the next PR.

fine, let's complete in the next PR.

[ShooterIT]

Thanks for impressive work @torwig