[Security][Acl] Issue #5787 : Added MutableAclProvider::deleteSecurityIdentity

Code style fix and documentation typo
adds support for PTY mode
adds convenience method mustRun
attempts to fix tests on Travis
adds cache for isPtySupported()
[FrameworkBundle] made sure that the debug event dispatcher is used everywhere
[FrameworkBundle] fixed path replacement on Windows

In the cache, blackslashes in paths can be both represented by a single
or a double backslash.
remove deprecated constraints calls (Min, Max, MaxLength, MinLength)
remove MinCount and MaxCount contraints. It has been replaced by Count constraints.
bug #9192 [2.2][Form] remove MinCount and MaxCount constraints in ValidatorTypeGuesser (franek)

This PR was merged into the 2.2 branch.

Discussion
----------

[2.2][Form] remove MinCount and MaxCount constraints in ValidatorTypeGuesser

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

MinCount and MaxCount has been removed and replaced by Count (in 2.2 also).

Commits
-------

58a3296 remove MinCount and MaxCount contraints. It has been replaced by Count constraints.
Merge branch '2.2' into 2.3

* 2.2:
  remove MinCount and MaxCount contraints. It has been replaced by Count constraints.
bug #9184 Fixed cache warmup of paths which contain back-slashes (fabpot)

This PR was merged into the 2.2 branch.

Discussion
----------

Fixed cache warmup of paths which contain back-slashes

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8781
| License       | MIT
| Doc PR        | n/a

From #8781

"
At this step in the warmup process there is a string replacement made, but paths with backslashes
are written into the cache file as something like `C:\\path\\to\\cache/pro_/...` but the str_replace
searches for the plain string `C:\path\to\cache/pro_/...`, which produces no matches.

The fix solves this by using var_export to escape the search (and replace) paths so they match the
format originally output into the cache file.
"

Commits
-------

526d285 [FrameworkBundle] fixed path replacement on Windows
[Form] Fixed memory leak in FormValidator
Check for lock existence before unlinking

My logs are filled with a bazillion errors stating "Warning: unlink(/var/www/mysite/app/cache/prod/http_cache/md/cf/47/c693da5dab3eccb65fa36a9b4b07ad0f7cc4.lck): No such file or directory in /var/www/mysite/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpCache/Store.php line 53"
bug #9207 [HttpKernel] Check for lock existence before unlinking (ollietb)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #9207).

Discussion
----------

[HttpKernel] Check for lock existence before unlinking

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

My logs are filled with a bazillion errors stating "Warning: unlink(/var/www/mysite/app/cache/prod/http_cache/md/cf/47/c693da5dab3eccb65fa36a9b4b07ad0f7cc4.lck): No such file or directory in /var/www/mysite/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpCache/Store.php line 53"

Commits
-------

89cd3b9 Check for lock existence before unlinking
fixed CS
[FramworkBundle][HttpKernel] Check event listener services are not abstract
bug #9214 [FramworkBundle] Check event listener services are not abstract (lyrixx)

This PR was merged into the 2.2 branch.

Discussion
----------

[FramworkBundle] Check event listener services are not abstract

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

Commits
-------

6744ead [FramworkBundle][HttpKernel] Check event listener services are not abstract
Fixed propel guessed relations
bug #9222 [Bridge] [Propel1] Fixed guessed relations (ClementGautier)

This PR was merged into the 2.2 branch.

Discussion
----------

[Bridge] [Propel1] Fixed guessed relations

<table>
  <tr><th>Q</th><th>A</th></tr>
  <tr><td>Bug fix</td><td>yes</td></tr>
  <tr><td>Feature addition</td><td>no</td></tr>
  <tr><td>Backwards compatibility break</td><td>no</td></tr>
  <tr><td>Symfony2 tests pass</td><td>yes</td></tr>
  <tr><td>Fixes the following tickets</td><td>N/A</td></tr>
  <tr><td>Todo</td><td>N/A</td></tr>
  <tr><td>License of the code</td><td>MIT</td></tr>
  <tr><td>Documentation PR</td><td>N/A</td></tr>
</table>

The `PropelTypeGuesser` did not match OneToMany relations properly. For example if you have a `Author` class with `Comments` attributes the guesser would guess "Comment" instead of "Comments".

I added some tests to ensure the non regression.

Commits
-------

0b1e95f Fixed propel guessed relations