platon_block_hash and platon_caller upgrade processing

[jatel]

#1779

Incorrect address obtained by calling contract platon_caller

[alayaci]

Can one of the admins verify this patch?

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (feature/bump-version-to-1.1.0@0dac6ef). Click here to learn what that means.
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@@                       Coverage Diff                        @@
##             feature/bump-version-to-1.1.0    #1800   +/-   ##
================================================================
  Coverage                                 ?   50.47%           
================================================================
  Files                                    ?      514           
  Lines                                    ?    60687           
  Branches                                 ?        0           
================================================================
  Hits                                     ?    30632           
  Misses                                   ?    26495           
  Partials                                 ?     3560           

Flag	Coverage Δ
unittests	50.47% <0.00%> (?)

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