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
[FrameworkBundle] The config:dump-reference command shows the list of bundles with the table helper
[Form] check the required output timezone against the actual timezone
of the input datetime object, rather than the expected timezone supplied
[Yaml] Fixed filename in the ParseException message
[Translation] Added support for JSON format (both loader and dumper).
[Security] fix typo
[Security] remove unused logger
merged branch Tobion/security-fix-typo (PR #9069)

This PR was merged into the 2.2 branch.

Discussion
----------

[Security] fix typo and remove unused logger

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

Commits
-------

a33cc51 [Security] remove unused logger
62de9c1 [Security] fix typo
fixed Git conflict
Merge branch '2.3'

* 2.3:
  fixed Git conflict
Fix `use` statements in HttpKernel\Client
merged branch stloyd/bugfix/use_statement (PR #9079)

This PR was merged into the 2.3 branch.

Discussion
----------

Fix `use` statements in HttpKernel\Client

Commits
-------

5d5ea9a Fix `use` statements in HttpKernel\Client
Merge brant pushch '2.3'

* 2.3:
  Fix `use` statements in HttpKernel\Client
[ExpressionLanguage] added the component
[ExpressionLanguage] added support for regexes
[DependencyInjection] added support for expressions in the service container
[HttpFoundation] added ExpressionRequestMatcher
added support for expression in control access rules
added a Twig extension to create Expression instances