VersionEye - Display information in the Merge request details view

Description

When viewing a merge request, we will indicate the status of the VersionEye reporting. This has to be done for both EE and CE.

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Specification

• Display a line below the CI state of the build showing if GitLab Version Service passed or failed.
• Add a new tab at the bottom, GitLab Version Service.
• The tab will show the same data as #862 (closed)
• If GitLab Version Service failed for this merge request, based on the settings for this feature on the repository, we will prevent merging.

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Wireframes

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Links / references

• Part of the meta issue #744 (closed)