duplicated the DebugClassLoader in the Debug component
merged branch fabpot/debug-classloader (PR #8870)

This PR was merged into the master branch.

Discussion
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duplicated the DebugClassLoader in the Debug component

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

This is a follow-up for #8553.

Commits
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d146461 duplicated the DebugClassLoader in the Debug component