Update TextTokenizerTest to use OpTransformerSpec

[tovbinm]

Related issues
TextTokenizerTest does not use OpTransformerSpec

Describe the proposed solution
Update TextTokenizerTest to use OpTransformerSpec

[wsuchy]

LGTM

[codecov]

Codecov Report

Merging #289 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #289      +/-   ##
=========================================
- Coverage   86.42%   86.4%   -0.02%     
=========================================
  Files         319     319              
  Lines       10453   10453              
  Branches      351     561     +210     
=========================================
- Hits         9034    9032       -2     
- Misses       1419    1421       +2

Impacted Files	Coverage Δ
...es/src/main/scala/com/salesforce/op/OpParams.scala	85.71% <0%> (-4.09%)	⬇️

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[salesforce-cla]

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