[Validator] Added Swedish translations
minor #11608 [Validator] Added Swedish translations (78) (Nyholm)

This PR was merged into the 2.6-dev branch.

Discussion
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[Validator] Added Swedish translations (78)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | part of #11489
| License       | MIT

Added the missing Swedish translations into master.

Commits
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d2bd92f [Validator] Added Swedish translations
Add shortcut methods to controllers

Add redirectToRoute, addFlash, isGranted and checkGranted to controllers
Change all the added methods to be protected

Change redirectToRoute, addFlash, isGranted and checkGranted access to protected
Check container and custom exception messages

Added a check on loaded services in addFlash and isGranted, changed checkGranted name to a more verbose one and allows to pass a message to the AccessDeniedException.
Changed function name and default message

denyAccessIfNotGranted -> denyAccessUnlessGranted and Access Denied"."