iox-#454 improve coverage of class roudi memory provider, memory block and memory manager

[nihalchari]

Pre-Review Checklist for the PR Author

1. Branch follows the naming format (iox-#123-this-is-a-branch)
2. Commits messages are according to this guideline
   • Commit messages have the issue ID (iox-#123 commit text)
   • Commit messages are signed (git commit -s)
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3. Update the PR title
   • Follow the same conventions as for commit messages
   • Link to the relevant issue
4. Relevant issues are linked
5. Add sensible notes for the reviewer
6. All checks have passed
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Notes for Reviewer

code contributed by @JimmyBch

Checklist for the PR Reviewer

• Commits are properly organized and messages are according to the guideline
• Code according to our coding style and naming conventions
• Unit tests have been written for new behavior
• Public API changes are documented via doxygen
• Copyright owner are updated in the changed files
• PR title describes the changes

Post-review Checklist for the PR Author

1. All open points are addressed and tracked via issues

Post-review Checklist for the Eclipse Committer

1. All checkboxes in the PR checklist are checked or crossed out
2. Merge

References

• partly closes Enhancing Tests in Roudi #454

[nihalchari]

closed PR #478 and created new

[JimmyBch]

@elBoberido @dkroenke Do you mind to review this PR and give your approval whether everything is ok ? :)

[dkroenke]

@nihalchari or @JimmyBch please fill in the Pre-Review Checklist of the PR description

[FerdinandSpitzschnueffler]

Can you please update the copyright headers in the changed files so that they include the years of the creation and of the last modification, i.e. 2019, 2021?

[elBoberido]

@FerdinandSpitzschnueffler we didn't do it for files which were created in 2019 and adapted in 2020, so I'm not sure if we have to. I would prefer not to do it if not necessary.