Add alias method to conform with ConstraintValidatorInterface in 2.3
Pass constraints with keys for all symfony versions
merged branch davedevelopment/validator-2.3-test-fixes (PR #686)

This PR was merged into the master branch.

Discussion
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Validator 2.3 test fixes

Commits
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ac4c5a5 Pass constraints with keys for all symfony versions
8796779 Add alias method to conform with ConstraintValidatorInterface in 2.3