Automatically set SO_REUSEPORT to True on Linux platform

[0xGosu]

Automatically set SO_REUSEPORT to True on Linux platform. Add a new test case to verify this, skip 1 existing test case which is not valid if SO_REUSEPORT is enable and fix assertion condition on another test case due to warning produced by this feature

This implement change 2 suggested in this issue: #1414

[codecov]

Codecov Report

Merging #1415 (1ec09c3) into master (a815fc7) will decrease coverage by 9.15%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master    #1415      +/-   ##
==========================================
- Coverage   71.77%   62.62%   -9.16%     
==========================================
  Files          30       30              
  Lines        3586     3593       +7     
==========================================
- Hits         2574     2250     -324     
- Misses       1012     1343     +331     

Impacted Files	Coverage Δ
tomodachi/transport/http.py	69.88% <75.00%> (-0.77%)	⬇️
tomodachi/transport/aws_sns_sqs.py	26.36% <0.00%> (-40.62%)	⬇️
tomodachi/discovery/aws_sns_registration.py	50.00% <0.00%> (-31.82%)	⬇️
tomodachi/container.py	66.66% <0.00%> (-4.98%)	⬇️
tomodachi/helpers/middleware.py	88.46% <0.00%> (-3.85%)	⬇️

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