Test Jira issue list settings

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🤓 What

The Jira integration test function tries to connect to the Jira server but even though the connection was successful it can still mean that the integration doesn't work.

We should also test loading issues to verify that the issue list feature works.

🔗 Related issues

In #244354 (closed) it was reported that the jira issue list feature sometimes does not work. This can be due to wrong configuration or insufficient user permissions. Those problems can be spotted using the test function.

📸 Screenshots

Test succeeds with non-existent project ID: Screenshot_2020-12-08_at_16.08.43

Implementation Guide

The Jira integration has a test method. Currently, it only tests if the Jira server can be reached. To test the issue list, we can try to make an API requires to the specific Jira project. We can re-use the IssuesFinder for that.

Edited by 🤖 GitLab Bot 🤖