[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()
remove deprecated constraints calls (Min, Max, MaxLength, MinLength)
Fix finder date constraints and tests
Fixed typos/CS/PHPDoc
[SecurityBundle] minor simplification in main configuration
Typo and better wording for german validator translation
minor #9599 [Validator] Typo and better wording for german validator translation (Danez)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #9599).

Discussion
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[Validator] Typo and better wording for german validator translation

Follow up of #9588 as supposed by @craue

Commits
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263b618 Typo and better wording for german validator translation
minor #9598 [SecurityBundle] minor simplification in main configuration (shieldo)

This PR was merged into the master branch.

Discussion
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[SecurityBundle] minor simplification in main configuration

As per @stof's suggestion (https://github.com/symfony/symfony/pull/9587#discussion_r7875630).

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

Commits
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0d8c34b [SecurityBundle] minor simplification in main configuration
[Security] Typos in Security's ExpressionLanguage
bug #9597 [Security] Typos in Security's ExpressionLanguage (ovrflo)

This PR was squashed before being merged into the master branch (closes #9597).

Discussion
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[Security] Typos in Security's ExpressionLanguage

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9593
| License       | MIT
| Doc PR        | none

Fixed the ExpressionLanguage and added the tests. It looks ok to me, but please, take a close look (some people will depend on this working right, including me :D ).

Thanks !

Commits
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087403b [Security] Typos in Security's ExpressionLanguage
updated version to 2.5
Consider KERNEL_DIR setting as relative to the PhpUnit XML file if it does not point to a directory (relative to the current cwd)
fixed @expectedException class names
fixed some typos
Adjusting CacheClear Warmup method to namespaced kernels

Backported the patch in #9525 to the 2.3 branch.
Fix an issue when overriding Client::setServerParameters() and using the getContainer() method in it.