[ISSUE #878] Clean expired message in CLUSTERING model for push_consumer

[cserwen]

What is the purpose of the change

Fix #878

Brief changelog

XX

Verifying this change

XXXX

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[codecov-commenter]

Codecov Report

Merging #879 (386bf60) into master (0fb106c) will increase coverage by 0.00%.
The diff coverage is 25.92%.

❗ Current head 386bf60 differs from pull request most recent head cddf564. Consider uploading reports for the commit cddf564 to get more accurate results

@@           Coverage Diff           @@
##           master     #879   +/-   ##
=======================================
  Coverage   25.00%   25.00%           
=======================================
  Files          51       51           
  Lines        6632     6666   +34     
=======================================
+ Hits         1658     1667    +9     
- Misses       4750     4773   +23     
- Partials      224      226    +2     

Impacted Files	Coverage Δ
consumer/push_consumer.go	11.34% <22.72%> (+0.29%)	⬆️
consumer/option.go	23.71% <40.00%> (+0.05%)	⬆️
primitive/ctx.go	0.00% <0.00%> (ø)
producer/interceptor.go	0.00% <0.00%> (ø)
producer/producer.go	28.35% <0.00%> (+0.35%)	⬆️

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