testing: fix TestStartAndStop

[algonautshant]

Summary

This fixes and enabled the test TestStartAndStop.

Test Plan

[codecov-commenter]

Codecov Report

Merging #2757 (9e00cf8) into master (3d3feb5) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2757   +/-   ##
=======================================
  Coverage   47.09%   47.09%           
=======================================
  Files         349      349           
  Lines       55858    55858           
=======================================
+ Hits        26306    26307    +1     
+ Misses      26604    26602    -2     
- Partials     2948     2949    +1     

Impacted Files	Coverage Δ
agreement/cryptoVerifier.go	75.73% <0.00%> (-2.21%)	⬇️
agreement/proposalManager.go	96.07% <0.00%> (-1.97%)	⬇️
network/requestTracker.go	71.12% <0.00%> (-0.44%)	⬇️
network/wsNetwork.go	60.73% <0.00%> (-0.19%)	⬇️
ledger/acctupdates.go	62.30% <0.00%> (-0.09%)	⬇️
catchup/service.go	69.35% <0.00%> (ø)
catchup/peerSelector.go	100.00% <0.00%> (+1.04%)	⬆️
rpcs/txSyncer.go	80.00% <0.00%> (+16.00%)	⬆️

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