Correlationid middleware

[pbbadenhorst]

Adding Correlation Id Middleware

[jcdickinson]

Just wait for the build to complete. Appveyor seems slow today.

[codecov]

Codecov Report

Merging #309 into master will increase coverage by 0.39%.
The diff coverage is 92.07%.

@@            Coverage Diff             @@
##           master     #309      +/-   ##
==========================================
+ Coverage   74.93%   75.32%   +0.39%     
==========================================
  Files          91       98       +7     
  Lines        4337     4438     +101     
==========================================
+ Hits         3250     3343      +93     
- Misses       1087     1095       +8

Impacted Files	Coverage Δ
...tCore.Middleware.Correlation/CorrelationOptions.cs	100% <100%> (ø)
...elation/CorrelationApplicationBuilderExtensions.cs	100% <100%> (ø)
...ddleware.Correlation/CorrelationContextAccessor.cs	100% <100%> (ø)
...tCore.Middleware.Correlation/CorrelationContext.cs	100% <100%> (ø)
...elation/CorrelationServicesCollectionExtensions.cs	100% <100%> (ø)
...re.Middleware.Correlation/CorrelationMiddleware.cs	100% <100%> (ø)
...eware.Correlation/Properties/Resources.Designer.cs	55.55% <55.55%> (ø)
... and 4 more

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