Fixed error on genesis block save

[iulianpascalau]

• fixed error on genesis block save
• switched some prints to log level TRACE

[codecov]

Codecov Report

Merging #3720 (bbcfef9) into development (220d4a2) will increase coverage by 0.00%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##           development    #3720   +/-   ##
============================================
  Coverage        73.78%   73.78%           
============================================
  Files              589      589           
  Lines            76213    76218    +5     
============================================
+ Hits             56231    56237    +6     
+ Misses           15534    15532    -2     
- Partials          4448     4449    +1     

Impacted Files	Coverage Δ
genesis/process/genesisBlockCreator.go	16.33% <0.00%> (-0.05%)	⬇️
trie/trieStorageManager.go	62.70% <40.00%> (ø)
factory/processComponents.go	64.40% <52.38%> (+0.15%)	⬆️
dataRetriever/chainStorer.go	100.00% <100.00%> (ø)
p2p/libp2p/netMessenger.go	74.72% <0.00%> (-0.28%)	⬇️
dataRetriever/interface.go	12.90% <0.00%> (+12.90%)	⬆️

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[andreibancioiu]

👍

I confirm that the method extraction (which resulted in the new saveMetaBlock() and saveShardBlock()) is a safe refactoring (checked diff).

[LucianMincu]

System tests passed.