Fix: make sure ObjectPipe does not overwrite sensible defaut name by …

[phil777]

…Pipe class

Checklist:

• If you are new to Scapy: I have checked CONTRIBUTING.md (esp. section submitting-pull-requests)
• I squashed commits belonging together
• I added unit tests or explained why they are not relevant
• I executed the regression tests (using cd test && ./run_tests or tox)
• If the PR is still not finished, please create a Draft Pull Request

fixes #xxx

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.58%. Comparing base (30b0398) to head (cc0e333).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4532   +/-   ##
=======================================
  Coverage   81.58%   81.58%           
=======================================
  Files         356      356           
  Lines       85292    85293    +1     
=======================================
+ Hits        69589    69590    +1     
  Misses      15703    15703           

Files with missing lines	Coverage Δ
scapy/pipetool.py	87.03% <100.00%> (+0.02%)	⬆️

... and 3 files with indirect coverage changes