Raise exception for invalid kwargs in Metric base class

[EPronovost]

What does this PR do?

Fixes #1426

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• Did you write any new necessary tests?

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[SkafteNicki]

Fixed the integration.
The integration test had the exact problem mentioned in the issue.

[codecov]

Codecov Report

Merging #1427 (3106fc3) into master (7b505ff) will increase coverage by 0%.
The diff coverage is 100%.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1427   +/-   ##
======================================
  Coverage      90%     90%           
======================================
  Files         211     211           
  Lines       10846   10849    +3     
======================================
+ Hits         9716    9719    +3     
  Misses       1130    1130