Code improvements for example notebooks

[alexott]

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

[CLAassistant]

All committers have signed the CLA.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 82.69%. Comparing base (da0da80) to head (30d8c51).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #48   +/-   ##
=======================================
  Coverage   82.69%   82.69%           
=======================================
  Files           9        9           
  Lines         780      780           
=======================================
  Hits          645      645           
  Misses        135      135           

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