Abstract graph consumer improvements

[ham1]

Description

• Formatting for readability
• Renamed misleading variable/methods revertKeysAndValues -> invertKeysAndValues
• Removed pointless JavaDoc which clutters the class

Motivation and Context

More unit testing and easier to understand code

How Has This Been Tested?

ant clean test-headless -Drmi_force_localhost=true

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (trunk@be3271f). Click here to learn what that means.
The diff coverage is 0%.

@@           Coverage Diff           @@
##             trunk    #450   +/-   ##
=======================================
  Coverage         ?   58.7%           
  Complexity       ?   10815           
=======================================
  Files            ?    1209           
  Lines            ?   77330           
  Branches         ?    7464           
=======================================
  Hits             ?   45397           
  Misses           ?   29393           
  Partials         ?    2540

Impacted Files	Coverage Δ	Complexity Δ
.../report/processor/graph/AbstractGraphConsumer.java	3.13% <0%> (ø)	3 <0> (?)

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