[DOC] Use sphinxcontrib-needs versions < 0.6.0
This latest version introduces a new services support functionality
- that cannot be easily disabled here
- and that requires additional configuration parameters to link GitHub issues.
We cannot provide these parameters since this project uses JIRA.
As a result, sphinx generates a warning.
https://sphinxcontrib-needs.readthedocs.io/en/service/services/index.html
Issue-ID: DOC-692
Signed-off-by: Guillaume Lambert <guillaume.lambert@orange.com>
Change-Id: I3bfa231467804729deacbe70f1180c06b3eec978