Fix random failures TestWaitAndAddConnectionTimeLongtWindow

[algonautshant]

Summary

TestWaitAndAddConnectionTimeLongtWindow is randomly failing when the execution of time sensitive statements is separated by more than the expected time gap.

This issue is fixed by replacing the sleep with simulated time passing by changing the recorded time, thus giving the impression that the event happened timeout time ago.

Test Plan

This is a test fix.

[codecov-commenter]

Codecov Report

Merging #2903 (a11b10b) into master (390edd1) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2903      +/-   ##
==========================================
- Coverage   47.11%   47.11%   -0.01%     
==========================================
  Files         349      349              
  Lines       56424    56424              
==========================================
- Hits        26584    26582       -2     
- Misses      26864    26866       +2     
  Partials     2976     2976              

Impacted Files	Coverage Δ
ledger/blockqueue.go	82.18% <0.00%> (-1.73%)	⬇️
cmd/tealdbg/debugger.go	72.86% <0.00%> (-1.01%)	⬇️
network/wsNetwork.go	60.90% <0.00%> (-0.19%)	⬇️
ledger/acctupdates.go	62.46% <0.00%> (-0.09%)	⬇️
data/transactions/verify/txn.go	45.08% <0.00%> (ø)
catchup/peerSelector.go	100.00% <0.00%> (+1.04%)	⬆️
network/wsPeer.go	75.48% <0.00%> (+1.11%)	⬆️

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[tsachiherman]

looks good, but please make sure it passes all the automated test.