Added integration test for relayed tx v2

[bogdan-rosianu]

added an integration test for relayed tx v2, which illustrates how such a transaction should be made + ensure the functionality

[codecov-commenter]

Codecov Report

Merging #4229 (c61130e) into development (4c6761d) will increase coverage by 0.60%.
The diff coverage is 91.65%.

❗ Current head c61130e differs from pull request most recent head 92153b5. Consider uploading reports for the commit 92153b5 to get more accurate results

@@               Coverage Diff               @@
##           development    #4229      +/-   ##
===============================================
+ Coverage        75.25%   75.85%   +0.60%     
===============================================
  Files              614      645      +31     
  Lines            82115    85221    +3106     
===============================================
+ Hits             61794    64643    +2849     
- Misses           15643    15785     +142     
- Partials          4678     4793     +115     

Impacted Files	Coverage Δ
dataRetriever/interface.go	12.12% <ø> (ø)
epochStart/bootstrap/baseStorageHandler.go	61.19% <ø> (ø)
factory/bootstrapComponentsHandler.go	61.40% <0.00%> (ø)
factory/consensusComponentsHandler.go	60.56% <0.00%> (+4.71%)	⬆️
factory/cryptoComponentsHandler.go	66.21% <0.00%> (ø)
factory/dataComponentsHandler.go	71.08% <0.00%> (ø)
factory/heartbeatComponentsHandler.go	64.17% <0.00%> (ø)
factory/networkComponentsHandler.go	78.49% <0.00%> (ø)
factory/stateComponentsHandler.go	72.04% <0.00%> (ø)
factory/statusComponentsHandler.go	16.45% <0.00%> (ø)
... and 153 more

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[BeniaminDrasovean]

Isn't an assert for nil useful here?

[bogdan-rosianu]

this is the same behavior as for the relayed tx integration test. I assume it is enough to only print the error if any. the test would fail anyway if this doesn't work