Iox #563 move tests in binding c and dds into anonymous namespace

[elBoberido]

Pre-Review Checklist for the PR Author

1. Code follows the coding style of CONTRIBUTING.md
2. Tests follow the best practice for testing
3. Branch follows the naming format (iox-#123-this-is-a-branch)
4. Commits messages are according to this guideline
   • Commit messages have the issue ID (iox-#123 commit text)
   • Commit messages are signed (git commit -s)
   • Commit author matches Eclipse Contributor Agreement (and ECA is signed)
5. Update the PR title
   • Follow the same conventions as for commit messages
   • Link to the relevant issue
6. Relevant issues are linked
7. Add sensible notes for the reviewer
8. All checks have passed (except task-list-completed)
9. Assign PR to reviewer

Notes for Reviewer

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

References

• Closes Move all tests into an anonymous namespace #563

[codecov]

Codecov Report

Merging #800 (cafaf0c) into master (2334abe) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #800      +/-   ##
==========================================
+ Coverage   74.34%   74.37%   +0.02%     
==========================================
  Files         322      322              
  Lines       11522    11522              
  Branches     1952     1952              
==========================================
+ Hits         8566     8569       +3     
+ Misses       2195     2194       -1     
+ Partials      761      759       -2     

Flag	Coverage Δ
unittests	73.19% <ø> (+0.01%)	⬆️
unittests_timing	30.92% <ø> (+0.18%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
iceoryx_hoofs/source/posix_wrapper/timer.cpp	61.90% <0.00%> (+0.43%)	⬆️
...nternal/roudi/introspection/port_introspection.inl	72.62% <0.00%> (+0.72%)	⬆️

[mossmaurice]

LGTM