Fix the reference pattern for merge requests in elasticsearch
What does this MR do?
Allow MRs to be searched by IID using !1
instead of #1
Are there points in the code the reviewer needs to double check?
Why was this MR needed?
Genuine bug
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary - Tests
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Added for this feature/bug -
All builds are passing
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Conform by the merge request performance guides -
Conform by the style guides -
Branch has no merge conflicts with master
(if it does - rebase it please) -
Squashed related commits together
What are the relevant issue numbers?
Closes #2360 (closed)