Fix groupby

[baubakg]

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #22 (d271821) into master (8693896) will increase coverage by 2.29%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master      #22      +/-   ##
============================================
+ Coverage     94.02%   96.31%   +2.29%     
- Complexity      179      184       +5     
============================================
  Files            12       12              
  Lines           435      434       -1     
  Branches         76       76              
============================================
+ Hits            409      418       +9     
+ Misses           14        8       -6     
+ Partials         12        8       -4     

Impacted Files	Coverage Δ	Complexity Δ
...dobe/campaign/tests/logparser/ParseDefinition.java	97.14% <ø> (-0.08%)	26.00 <0.00> (ø)
...va/com/adobe/campaign/tests/logparser/LogData.java	98.64% <100.00%> (+13.71%)	29.00 <0.00> (+5.00)
...om/adobe/campaign/tests/logparser/StdLogEntry.java	96.00% <100.00%> (ø)	32.00 <0.00> (ø)

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