Added unit-test for NLogProviderOptions.IncludeActivtyIdsWithBeginScope

[snakefoot]

See also #456

[codecov-io]

Codecov Report

Merging #463 (8b5a8c5) into master (41b4a13) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #463   +/-   ##
=======================================
  Coverage   81.41%   81.41%           
=======================================
  Files          14       14           
  Lines        1227     1227           
  Branches      204      204           
=======================================
  Hits          999      999           
  Misses        154      154           
  Partials       74       74           

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[304NotModified]

Thanks!!