tests: Fix account tests for calling pending txn endpoint and box tests

[algochoi]

Summary

This PR changes some existing tests that call the GetPendingTransactions endpoint to use the v2 model instead of the v1 model. Also changes the goal box command to account for client-side error string handling.

Test Plan

Integration tests.

[codecov]

Codecov Report

Merging #4751 (1f6e037) into master (06d146b) will increase coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #4751      +/-   ##
==========================================
+ Coverage   54.53%   54.56%   +0.03%     
==========================================
  Files         414      414              
  Lines       53607    53607              
==========================================
+ Hits        29234    29253      +19     
+ Misses      21945    21929      -16     
+ Partials     2428     2425       -3     

Impacted Files	Coverage Δ
cmd/goal/box.go	21.62% <0.00%> (ø)
ledger/blockqueue.go	85.63% <0.00%> (-2.88%)	⬇️
catchup/peerSelector.go	98.95% <0.00%> (-1.05%)	⬇️
data/transactions/verify/txn.go	76.19% <0.00%> (-0.96%)	⬇️
network/wsNetwork.go	65.52% <0.00%> (+0.18%)	⬆️
catchup/service.go	68.64% <0.00%> (+0.49%)	⬆️
ledger/testing/randomAccounts.go	57.23% <0.00%> (+0.61%)	⬆️
crypto/merkletrie/node.go	93.48% <0.00%> (+1.86%)	⬆️
network/wsPeer.go	68.44% <0.00%> (+1.94%)	⬆️
crypto/merkletrie/trie.go	68.61% <0.00%> (+2.18%)	⬆️
... and 1 more

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[michaeldiamant]

@algochoi Thanks for the fix - Merging now to address failed build: https://app.circleci.com/pipelines/github/algorand/go-algorand/10341/workflows/c4dac869-0f91-4ce1-8b7d-abd0e5e63ea9.

@jasonpaulos I request that you still perform a review to identify pending threads.

[jasonpaulos]

Changes look good to me

[algorandskiy]

@algochoi @michaeldiamant looks like there is another one in e2e subs box-search.sh:

+ '[' 'Error processing command: HTTP 404 Not Found: box not found' = 'No box found for appid 75 with name str:not_found' ']'

[jasonpaulos]

@algorandskiy that failure was addressed by the change to cmd/goal/box.go in this PR. The build now passes on master.