security acl dbal schema: inject the schema instead of the whole container
merged branch dbu/security-dbal-listener-cleanup (PR #8521)

This PR was merged into the master branch.

Discussion
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security acl dbal schema: inject the schema instead of the whole container

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

following a discussion with @Stof on https://github.com/doctrine/DoctrinePHPCRBundle/pull/78 i thought to clean up the code i used as template as well.

Commits
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b960004 security acl dbal schema: inject the schema instead of the whole container