fix(gerrit): not auto-approving if change already had a Code-Review +1

[felipecrs]

Changes

The checkIfApproved function was not working as expected when someone already had published a Code-Review +1 vote. It was wrongly assuming that the change was approved in such case, while the change should only be approved if the change had a Code-Review +2 vote.

Note that when o=DETAILED_LABELS is set, the change response from Gerrit API no longer contains the content from o=LABELS, meaning it should only ever be used in this case (when looking for the approvals), otherwise it would break existing code.

Context

I self-host Renovate and I noticed that auto-merge was not working as expected. I realized it was caused by this issue, because for a given project we have here, the same user/robot also votes the change with a Code-Review +1 vote when SonarQube analysis is successful (which is a very known pattern).

Documentation (please check one with an [x])

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How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository