Back out the fix at [ba7d5bad32ad6aac] because it does not always work and because

Back out the fix at [ba7d5bad32ad6aac] because it does not always work and because
it causes a performance regression.  Add new test cases for row-value lookups of
indexes that contain redundant columns, three of which are currently failing.  This
branch is seeking an improved solution to the redundant index column problem for
row-value lookups.

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