Iterate over all handlers on unhandled peer message

[jberci]

Extracted from #3745

[codecov]

Codecov Report

Merging #3838 (f29b482) into master (aaee89b) will increase coverage by 0.02%.
The diff coverage is 69.23%.

@@            Coverage Diff             @@
##           master    #3838      +/-   ##
==========================================
+ Coverage   67.01%   67.04%   +0.02%     
==========================================
  Files         404      404              
  Lines       41384    41393       +9     
==========================================
+ Hits        27734    27750      +16     
+ Misses       9702     9699       -3     
+ Partials     3948     3944       -4     

Impacted Files	Coverage Δ
go/worker/common/committee/node.go	70.76% <0.00%> (ø)
go/worker/common/p2p/error/error.go	100.00% <ø> (ø)
go/worker/common/p2p/dispatch.go	74.13% <75.00%> (-0.63%)	⬇️
go/common/sgx/aesm/aesm.go	62.61% <0.00%> (-6.55%)	⬇️
go/worker/common/committee/runtime_host.go	64.28% <0.00%> (-6.25%)	⬇️
go/consensus/api/submission.go	67.10% <0.00%> (-5.27%)	⬇️
go/runtime/host/sgx/sgx.go	69.23% <0.00%> (-2.20%)	⬇️
.../consensus/tendermint/apps/registry/state/state.go	56.70% <0.00%> (-1.22%)	⬇️
go/registry/api/api.go	53.23% <0.00%> (-1.11%)	⬇️
go/consensus/tendermint/abci/state.go	70.27% <0.00%> (-0.68%)	⬇️
... and 21 more

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