Add a test case to show that a branch name with a period can be
fetched with a `get()`

Closes: #1715

BREAKING-CHANGE: The gitlab CLI will now accept CLI arguments
and environment variables for its global options in addition
to configuration file options. This may change behavior for
some workflows such as running inside GitLab CI and with
certain environment variables configured.

Fix functional test failure if config present and configured with
token.

Closes: #1791

If a query returns more than 10,000 records than the following values
are NOT returned:
  x.total_pages
  x.total

Modify the code to allow no value to be set for these values. If there
is not a value returned the functions will now return None.

Update unit test so no longer `xfail`

https://docs.gitlab.com/ee/user/gitlab_com/index.html#pagination-response-headers

Closes #1686

Ensure reset_gitlab() succeeds by waiting to make sure everything has
been deleted as expected. If the timeout is exceeded fail the test.

Not using `wait_for_sidekiq` as it didn't work. During testing I
didn't see any sidekiq processes as being busy even though not
everything was deleted.

chore: skip a functional test if not using >= py3.9

One of the tests requires Python 3.9 or higher to run. Mark the test
to be skipped if running Python less than 3.9.

When running with docker-compose on Ubuntu 20.04 I got the error:

  $ docker-compose up
  ERROR: The Compose file './docker-compose.yml' is invalid because:
  networks.gitlab-network value Additional properties are not allowed ('name' was unexpected)

Changing the version in the docker-compose.yml file fro '3' to '3.5'
resolved the issue.