Add This field is missing RU translation

<source>This field is missing.</source>
Have no translation. Not exists in EN version too. Just forgotten? 
Symfony\Component\Validator\Constraints\Collection()
public $missingFieldsMessage = 'This field is missing.';
merged branch fabpot/moved_validator_4 (PR #7784)

This PR was merged into the 2.1 branch.

Discussion
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Add This field is missing RU translation

This PR was submitted on the symfony/Validator read-only repository and moved automatically to the main Symfony repository (closes symfony/Validator#4).

<source>This field is missing.</source>
Have no translation. Not exists in EN version too. Just forgot? 
Symfony\Component\Validator\Constraints\Collection()
public $missingFieldsMessage = 'This field is missing.';

Commits
-------

97c4291 Add This field is missing RU translation
Re-added context information to log list

Fixes #7679
merged branch mweimerskirch/patch-16 (PR #7806)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #7806).

Discussion
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[Profiler] Re-added context information to log list

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7679
| License       | MIT

Commits
-------

55c2044 [Profiler] Re-added context information to log list
Added reloading of fallback catalogues when calling addResource() (#7715)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7715
| License       | MIT
| Doc PR        |
Reset all catalogues when adding resource to fallback locale (#7715, #7819)

Slightly refactored testAddResourceAfterTrans()
and replaced costly part with reset all catalogues

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7715, #7819
| License       | MIT
| Doc PR        |
merged branch hilobok/ticket_7715 (PR #7819)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #7819).

Discussion
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[Translator] Added reloading of fallback catalogues when calling addResource() (#7715)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7715
| License       | MIT
| Doc PR        |

Commits
-------

4f0b063 [Translator] Reset all catalogues when adding resource to fallback locale (#7715, #7819)
5544f36 [Translator] Added reloading of fallback catalogues when calling addResource() (#7715)
Rename misprint property (from warmer to finder)
merged branch alexpods/patch-1 (PR #7837)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #7837).

Discussion
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Rename misprint property (from warmer to finder)

Commits
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a1f5bd5 Rename misprint property (from warmer to finder)
[PropertyAccess] Made naming consistent with Form and Validator
[Console] find command even if its name is a namespace too (closes #7860)
Place hasArgument() check at the beginning of getArgument() method 

If input definition doesn't have specified argument, then unnecessary operations will be executed ($arguments = is_int($name) ? array_values($this->arguments) : $this->arguments;)
merged branch pborreli/bug-7860 (PR #7863)

This PR was merged into the 2.2 branch.

Discussion
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[Console] is not ambiguous anymore if it has a perfect match command name (closes #7860)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes, locally
| Fixed tickets | #7860
| License       | MIT
| Doc PR        | no

Commits
-------

be34917 [Console] find command even if its name is a namespace too (closes #7860)
[Process] Fix #5594 : `termsig` must be used instead of `stopsig` in exceptions when a process is signaled
Fix http-kernel dep in symfony/security

The current constraint will not match 2.3.x-dev and cause edge cases
where either:

* composer falls back to symfony/symfony because it cannot find a match
* composer installs 2.2 versions of http-kernel and http-foundation
Added missing information to the UPGRADE-3.0 file and sorted its sections
[Validator] Rename issn constraint message option to be consistent with all constraints having a single message option
merged branch ajgarlag/feature/issn-validator-message-option (PR #7872)

This PR was merged into the master branch.

Discussion
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[Validator] Rename issn constraint message option.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Rename issn constraint message option to be consistent with all constraints having a single message option as suggested by @stof at https://github.com/symfony/symfony/commit/a4abfb95509437153bee13f1a49ae74a63408806#L0R23

Commits
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57c724a [Validator] Rename issn constraint message option to be consistent with all constraints having a single message option
merged branch alexpods/patch-1 (PR #7864)

This PR was merged into the master branch.

Discussion
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Place hasArgument() check at the beginning of getArgument() method

If input definition doesn't have specified argument, then unnecessary operations will be executed ($arguments = is_int($name) ? array_values($this->arguments) : $this->arguments;)

Commits
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992c218 Place hasArgument() check at the beginning of getArgument() method
merged branch bschussek/doc-fix (PR #7867)

This PR was merged into the master branch.

Discussion
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Added missing information to the UPGRADE-3.0 file and sorted its sections

Commits
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7e7e4c0 Added missing information to the UPGRADE-3.0 file and sorted its sections