Renames plugin name to normalized name set by infra; cleans up tests

[dbbaughe]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #390 (253815f) into master (0b4c8f2) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #390   +/-   ##
=========================================
  Coverage     76.53%   76.53%           
  Complexity     1462     1462           
=========================================
  Files           188      188           
  Lines          7335     7335           
  Branches       1190     1190           
=========================================
  Hits           5614     5614           
  Misses         1077     1077           
  Partials        644      644           

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