fix pagination problem in commit comments[gitlab]

[mynk8]

TODO:

• Write new tests or update the old ones to cover new functionality.
• change the get_commit_comments functions to return a full list of commit comments.

Fixes #894

RELEASE NOTES BEGIN

We have fixed pagination problems in ogr's GitlabProject.get_commit_comments().

RELEASE NOTES END

[softwarefactory-project-zuul]

Build succeeded.
https://softwarefactory-project.io/zuul/t/packit-service/buildset/96a93d89ed054377be0d6ad4fc9987b2

✔️ pre-commit SUCCESS in 2m 51s
✔️ ogr-tests-pip-deps SUCCESS in 17m 29s

[softwarefactory-project-zuul]

Build succeeded.
https://softwarefactory-project.io/zuul/t/packit-service/buildset/c7414325efb34b2e8819bf7a8b5b03e0

✔️ pre-commit SUCCESS in 2m 33s
✔️ ogr-tests-pip-deps SUCCESS in 17m 39s

[softwarefactory-project-zuul]

Build succeeded (gate pipeline).
https://softwarefactory-project.io/zuul/t/packit-service/buildset/88951e8491a748b9992cdb115f854f7d

✔️ pre-commit SUCCESS in 2m 34s

[softwarefactory-project-zuul]

Pull request merge failed: Required status check "Notes are either written, or there are none / release-notes" is expected.

[mfocko]

regate

[softwarefactory-project-zuul]

Build succeeded (gate pipeline).
https://softwarefactory-project.io/zuul/t/packit-service/buildset/a2b0724bdd01454f9b0a4c4f720c8e93

✔️ pre-commit SUCCESS in 2m 36s