[Form] improve error message with a "hasser" hint for PropertyAccessDeniedException

Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: no, but fails exactly the same as without this fix
Fixes the following tickets: -
Todo: -
License of the code: MIT
Documentation PR: symfony/symfony-docs#1958
Updated Bulgarian translation

Added Bulgarian translation for form component.
Updated Bulgarian translation for validator messages.
merged branch RoumenMe/translation-2.1 (PR #6112)

This PR was merged into the 2.1 branch.

Commits
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7cba683 Updated Bulgarian translation

Discussion
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[Validator][Form] Updated Bulgarian translation

Added Bulgarian translation for form component.
Updated Bulgarian translation for validator messages.

Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: [![Build Status](https://secure.travis-ci.org/RoumenMe/symfony.png?branch=translation-2.1)](https://travis-ci.org/RoumenMe/symfony)
Fixes the following tickets: -
Todo: -
License of the code: MIT
Documentation PR: -
merged branch bicpi/add_hasser_hint (PR #6110)

This PR was merged into the 2.1 branch.

Commits
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06ee53b [Form] improve error message with a "hasser" hint for PropertyAccessDeniedException

Discussion
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[Form] improve error msg w/ a "hasser" hint for PropertyAccessDeniedException

"Hasser" support was added under the 2.1 branch of the Form component

Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: no, but fails exactly the same as without this fix
Fixes the following tickets: -
Todo: -
License of the code: MIT
Documentation PR: symfony/symfony-docs#1958
Edited some minor grammar and style errors in russian validation file
merged branch andremaha/validator_russian_translation (PR #6106)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #6106).

Commits
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e628c26 [Validator] Edited some minor grammar and style errors in russian validation file

Discussion
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[Validator] Edited some minor grammar and style errors in russian validation file

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: -
Todo: -
License of the code: MIT
Documentation PR:
[Validator] Fix typos in validators.ru.xlf
merged branch rybakit/validator_messages (PR #6114)

This PR was merged into the 2.1 branch.

Commits
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31c32c5 [Validator] Fix typos in validators.ru.xlf

Discussion
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[Validator] Fix typos in validators.ru.xlf

This PR fixes PR #6106 as it still [contains some issues](https://github.com/symfony/symfony/pull/6106#discussion_r2215735).  I also removed the word "файла" ([L119](https://github.com/rybakit/symfony/blob/31c32c551fc2a4a9d5140c5ac554fa65874f3321/src/Symfony/Component/Validator/Resources/translations/validators.ru.xlf#L119)), as it is not necessary and there is no such addition in the other messages (e.g. [L167](https://github.com/symfony/symfony/blob/2.1/src/Symfony/Component/Validator/Resources/translations/validators.ru.xlf#L167), [L171](https://github.com/symfony/symfony/blob/2.1/src/Symfony/Component/Validator/Resources/translations/validators.ru.xlf#L171), ...).