Renaming JaccardDistance to JaccardSimilarity

[tillbe]

Related issues
https://gitter.im/salesforce-TransmogrifAI-Issues/Issues

JaccardSimilarity was wrongly named as JaccardDistance.

Describe the proposed solution
Renaming the function to its correct name.

Describe alternatives you've considered

Additional context

[salesforce-cla]

Thanks for the contribution! It looks like @tillbe is an internal user so signing the CLA is not required. However, we need to confirm this.

[tovbinm]

lgtm

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@f6bc301). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master      #80   +/-   ##
=========================================
  Coverage          ?   85.95%           
=========================================
  Files             ?      294           
  Lines             ?     9547           
  Branches          ?      551           
=========================================
  Hits              ?     8206           
  Misses            ?     1341           
  Partials          ?        0

Impacted Files	Coverage Δ
...ala/com/salesforce/op/utils/stats/JaccardSim.scala	0% <ø> (ø)
...rce/op/stages/impl/feature/JaccardSimilarity.scala	100% <100%> (ø)
...rce/op/stages/impl/feature/PhoneNumberParser.scala	100% <100%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f6bc301...47f097a. Read the comment docs.