Refactor block verification

[jsdanielh]

• Refactor block verification functions in blockchain such that they can be split by its small verification functions that only receive as argument the required information.
• Add tests at the primitives block crate to stimulate the block verification functionality.

Pull request checklist

• [X] All tests pass. Demo project builds and runs.
• [X] I have resolved any merge conflicts.

[codecov[bot]]

Codecov Report

Base: 65.00% // Head: 65.01% // Increases project coverage by +0.00% :tada:

Coverage data is based on head (97fbfad) compared to base (6a677a2). Patch coverage: 80.30% of modified lines in pull request are covered.

:exclamation: Current head 97fbfad differs from pull request most recent head 75a5bb8. Consider uploading reports for the commit 75a5bb8 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           albatross    #1125    +/-   ##
===========================================
  Coverage      65.00%   65.01%            
===========================================
  Files            368      368            
  Lines          45151    44967   -184     
===========================================
- Hits           29351    29235   -116     
+ Misses         15800    15732    -68     

Flag	Coverage Δ
unittests	65.01% <80.30%> (+<0.01%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
blockchain/src/abstract_blockchain.rs	89.06% <0.00%> (-6.36%)	:arrow_down:
blockchain/src/error.rs	50.00% <ø> (+2.63%)	:arrow_up:
light-blockchain/src/push.rs	0.00% <0.00%> (ø)
primitives/block/src/lib.rs	100.00% <ø> (ø)
validator/src/tendermint.rs	0.00% <0.00%> (ø)
primitives/block/src/micro_block.rs	81.57% <78.29%> (+8.85%)	:arrow_up:
primitives/block/src/macro_block.rs	87.02% <79.03%> (+8.67%)	:arrow_up:
consensus/src/sync/history/cluster.rs	87.19% <84.21%> (-0.56%)	:arrow_down:
primitives/block/src/block.rs	61.75% <86.15%> (+7.35%)	:arrow_up:
blockchain/src/blockchain/verify.rs	62.93% <93.10%> (-4.77%)	:arrow_down:
... and 23 more

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