[Validator] added missing estonian translation of messages
merged branch kgilden/trans_et (PR #7769)

This PR was merged into the 2.1 branch.

Discussion
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[Validator] added missing estonian translation of messages

| Q             | A
| ------------- | ---
| Fixed tickets | -
| License       | MIT

Commits
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efff50a [Validator] added missing estonian translation of messages