JSON module: option for SIEM-friendly output

[TheTechromancer]

Addresses the SIEM friendliness of BBOT data as discussed in #755.

@nicpenning

This PR adds an option to the json output module, siem_friendly, which when set to true, will format the JSON differently:

{
  "type": "DNS_NAME",
  "data": {
    "DNS_NAME": "blacklanternsecurity.com"
  }
}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a824a5e) 92% compared to head (bdac5d6) 92%.
Report is 1 commits behind head on dev.

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #1049   +/-   ##
=====================================
- Coverage     92%     92%   -0%     
=====================================
  Files        304     304           
  Lines      19269   19283   +14     
=====================================
- Hits       17724   17711   -13     
- Misses      1545    1572   +27     

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[nicpenning]

Woohoo! Will test soon, thank you! 🙏

[nicpenning]

FYI - Elastic Integration being built to take advantage of this work.

elastic/integrations#9427

[CarsonHrusovsky]

This is very exciting!