Fix missing call to decrease rating into peers rating handler

[sstanculeanu]

Reasoning behind the pull request

• call to decrease peer rating is missing

Proposed changes

• add call to decrease rating and add integration test

Testing procedure

• standard system test + integration test[coming in next PR]

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

[codecov-commenter]

Codecov Report

Base: 70.80% // Head: 70.80% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (348a321) compared to base (1dbcfff).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@              Coverage Diff              @@
##           rc/v1.5.0    #4780      +/-   ##
=============================================
- Coverage      70.80%   70.80%   -0.01%     
=============================================
  Files            644      644              
  Lines          84817    84818       +1     
=============================================
- Hits           60058    60057       -1     
- Misses         20256    20257       +1     
- Partials        4503     4504       +1     

Impacted Files	Coverage Δ
...solvers/topicResolverSender/topicResolverSender.go	100.00% <100.00%> (ø)
common/pidQueue.go	93.33% <0.00%> (-3.34%)	⬇️
state/accountsDB.go	78.89% <0.00%> (ø)
node/metrics/metrics.go	65.94% <0.00%> (ø)

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