[FrameworkBundle] Added yaml:lint command
feature #9666 [FrameworkBundle] Added a yaml:lint command (lyrixx)

This PR was merged into the 2.5-dev branch.

Discussion
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[FrameworkBundle] Added a yaml:lint command

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9645
| License       | MIT
| Doc PR        | n/a

Commits
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9c06b27 [FrameworkBundle] Added yaml:lint command