properly handle exceptions in translator listener

The `setLocale()` method can throw an `\InvalidArgumentException` when
an invalid locale has been passed. These exceptions must be handled by
the `TranslatorListener` which should then pass the request's default
locale instead.
register `TranslatorListener` service

Since the `TranslatorListener` was not registered as a service, the
proper locale would never have been passed from the current request
to the translator.
bug #12182 [FrameworkBundle] register `TranslatorListener` service (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[FrameworkBundle] register `TranslatorListener` service

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12167
| License       | MIT
| Doc PR        |

Since the `TranslatorListener` was not registered as a service, the
proper locale would never have been passed from the current request
to the translator.

Commits
-------

3b578a6 register `TranslatorListener` service
bug #12181 [HttpKernel] properly handle exceptions in translator listener (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[HttpKernel] properly handle exceptions in translator listener

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

The `setLocale()` method can throw an `\InvalidArgumentException` when
an invalid locale has been passed. These exceptions must be handled by
the `TranslatorListener` which should then pass the request's default
locale instead.

Commits
-------

d3a0a55 properly handle exceptions in translator listener
Prevent an empty choice list being passed in debug:container
bug #12180 Prevent an empty choice list being passed in debug:container (weaverryan)

This PR was squashed before being merged into the 2.6-dev branch (closes #12180).

Discussion
----------

Prevent an empty choice list being passed in debug:container

Hi guys!

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

Currently, there is a "bug" where if you pass an empty array to ChoiceList, then you get this following warning from `QuestionHelper::doAsk()`:

>
Warning: max(): Array must contain at least one element

That should probably be fixed too, but it would go on an earlier version, so I didn't want to mix fixes for different branches.

Thanks!

Commits
-------

ef23b63 Prevent an empty choice list being passed in debug:container
add changelog entry for web server commands
minor #12184 [FrameworkBundle] add changelog entry for web server commands (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[FrameworkBundle] add changelog entry for web server commands

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

I just noticed that I forgot to add a changelog entry in #11311.

Commits
-------

292088f add changelog entry for web server commands