Suggested Improvements to Gitlab Connector

[VishDev12]

Hey Team! Here are some issues I faced with the Gitlab Connector:

• The include_issues attribute is False by default when creating the connector and there is no frontend field to modify this.
• When listing Gitlab MRs (or any resource I believe) with the python-gitlab package, by default, only 20 elements are returned because Pagination is the default behaviour. So the code can be modified so that pagination is used to iterate through the results or get_all=True can be used to force the API to return all the results immediately.