Make getNode function public

The getNode function should be public so that DomElement objects can be accessed directly if need be.
[Process] Added ProcessBuilder::addEnvironmentVariables
Return BC compatibility for `@Route` parameters and default values
[FrameworkBundle] The config:dump-reference command shows the list of bundles with the table helper
[BrowserKit] Pass headers when `followRedirect()` is called
[Form] check the required output timezone against the actual timezone
of the input datetime object, rather than the expected timezone supplied
[Translation] Fixed regression: When only one rule is passed to transChoice(), this rule should be used
[Validator] fixed Boolean handling in XML constraint mappings (closes #5603)
merged branch fabpot/validator-xml-loader (PR #8831)

This PR was merged into the 2.2 branch.

Discussion
----------

[Validator] fixed Boolean handling in XML constraint mappings

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #5603
| License       | MIT
| Doc PR        | n/a

ping @bschussek

Commits
-------

33b0a17 [Validator] fixed Boolean handling in XML constraint mappings (closes #5603)
[Yaml] fixed embedded folded string parsing
merged branch jfsimon/issue-8472 (PR #8841)

This PR was merged into the 2.2 branch.

Discussion
----------

[Yaml] fixed embedded folded string parsing

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8779

Commits
-------

566d79c [Yaml] fixed embedded folded string parsing
[Translation] Grammar fix
[Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed
[Locale] Fixed: Locale::setDefault() throws no exception when "en" is passed

Conflicts:
	src/Symfony/Component/Locale/Stub/StubLocale.php
	src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
merged branch bschussek/fix-locale-2.2 (PR #8846)

This PR was merged into the 2.2 branch.

Discussion
----------

[2.2][Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed

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

This is necessary to fix `IntlTestHelper::requireIntl()` when ICU is not installed and the Icu component 1.0.0 is used instead. In that case, `IntlTestHelper::requireIntl()` calls `\Locale::setDefault('en')` and fails. Consequently, the Form component test cases are partially red when running without ICU installed.

This PR fixes that.

Commits
-------

d0faf55 [Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed
Merge branch '2.2' into 2.3

* 2.2:
  [Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed
  [Yaml] fixed embedded folded string parsing
  [Validator] fixed Boolean handling in XML constraint mappings (closes #5603)

Conflicts:
	src/Symfony/Component/Locale/Stub/StubLocale.php
	src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
merged branch bschussek/fix-locale-2.3 (PR #8847)

This PR was merged into the 2.3 branch.

Discussion
----------

[2.3][Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed

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

Same as #8846 for 2.3+.

Commits
-------

e1f40f2 [Locale] Fixed: Locale::setDefault() throws no exception when "en" is passed
merged branch bschussek/issue8789-regression (PR #8837)

This PR was merged into the 2.2 branch.

Discussion
----------

[Translation] Fixed regression: When only one rule is passed to transChoice(), this rule should be used

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

There was one regression introduced by #8789, namely when exactly one message is passed to `transChoice()`. Before, the following code was perfectly valid:

```php
$translator = new IdentityTranslator(new MessageSelector());

echo $translator->transChoice('There are two apples', 2, array('%count%' => 2));
```

This didn't fail, because internally, the locale `null` was passed to `MessageSelector`, which always returned the index `0` in that case.

Now, the user's locale is passed, and if the selector returns anything but `0`, an exception is thrown.

I removed this exception for the case that exactly one standard message (without explicit interval) is passed. In that case, this message is returned (just like from `trans()`). If the message key contains more than one message, or if the message has explicit intervals, the exception will still be thrown. See the tests for clarification.

A use case for why no exception should be thrown is validation:

```php
/**
 * @Assert\Length(min=2, minMessage="Please enter at least two characters")
 */
```

Commits
-------

2b3dcb9 [Translation] Grammar fix
0951b8d [Translation] Fixed regression: When only one rule is passed to transChoice(), this rule should be used
[Form] Fixed Form::all() signature for PHP 5.3.3
[Form] Fixed Form::all() signature for PHP 5.3.3