Code improvements for example notebooks

[alexott]

For Splunk ingestion don't use the raw endpoint, but normal JSON endpoint.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (da0da80) 82.69% compared to head (8934a3f) 82.69%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #47   +/-   ##
=======================================
  Coverage   82.69%   82.69%           
=======================================
  Files           9        9           
  Lines         780      780           
=======================================
  Hits          645      645           
  Misses        135      135           

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