Commit to current branch by default in Web IDE E2E tests

What does this MR do?

The tests reported in https://gitlab.com/gitlab-org/quality/nightly/issues/127 are now fixed by omnibus-gitlab!3542 (merged), but the elasticsearch one still failed because the default Web IDE commit option was changed: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/31449

So the license file was committed to a branch instead of master and didn't get indexed.

This fix commits the file to master again. It also dequarantines the elasticsearch test.

CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/32248

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content