Allow position modifier to be negative using push at position on Update. [DATAMONGO-2055]

[spring-projects-issues]

Christoph Strobl opened DATAMONGO-2055 and commented

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Reference URL: https://docs.mongodb.com/manual/release-notes/3.6/#negative-array-index-position-for-push

Referenced from: pull request #600

Backported to: 2.0.10 (Kay SR10), 1.10.15 (Ingalls SR15)