[Debug] add some file link format handling
remove invalid tests

With #12046, the `getLocale()` method isn't overriden anymore by the
`Translator` from the FrameworkBundle, but the locale is set by the
new `TranslatorListener`. Therefore, the tests ensuring the old
behavior are removed.
[DebugBundle] fix dev dependencies
feature #12045 [Debug] add some file link format handling (nicolas-grekas)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[Debug] add some file link format handling

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

Commits
-------

c6923af [Debug] add some file link format handling
minor #12077 [DebugBundle] fix dev dependencies (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[DebugBundle] fix dev dependencies

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

Commits
-------

3454e59 [DebugBundle] fix dev dependencies
minor #12076 [FrameworkBundle] remove invalid tests (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[FrameworkBundle] remove invalid tests

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

With #12046, the `getLocale()` method isn't overriden anymore by the `Translator` from the FrameworkBundle, but the locale is set by the new `TranslatorListener`. Therefore, the tests ensuring the old behavior are removed.

Commits
-------

80d52c7 remove invalid tests
[HttpKernel] Initialize DataCollector data as array

This fixes a DumpDataCollector error when the debug panel is opened
without collected data:

ContextErrorException: Warning: Invalid argument supplied for foreach() -
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php at line 165
bug #12079 [HttpKernel] Initialize DataCollector data as array (1ed)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[HttpKernel] Initialize DataCollector data as array

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

Without this I'm getting an exception when I open the debug panel without collected data.

```
ContextErrorException: Warning: Invalid argument supplied for foreach()   -
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php at line 165

Commits
-------

986df54 [HttpKernel] Initialize DataCollector data as array