[Release 1.31] Fix e2e test bug in mixedosbgp

[manuelbuil]

Backport: #6840

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 9.54%. Comparing base (909d20d) to head (ea87d3f).

❗ There is a different number of reports uploaded between BASE (909d20d) and HEAD (ea87d3f). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (909d20d)	HEAD (ea87d3f)
inttests	2	1
unittests	1	0

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.31   #6843       +/-   ##
================================================
- Coverage         25.11%   9.54%   -15.57%     
================================================
  Files                33      33               
  Lines              2839    2839               
================================================
- Hits                713     271      -442     
- Misses             2079    2545      +466     
+ Partials             47      23       -24     

Flag	Coverage Δ
inttests	9.54% <ø> (ø)
unittests	?

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