[2.x] upgrade plotly to v2

[joshuali925]

Description

backports #335

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2a756cf) 94.73% compared to head (4d4e8ff) 94.73%.
Report is 2 commits behind head on 2.x.

Additional details and impacted files

@@           Coverage Diff           @@
##              2.x     #336   +/-   ##
=======================================
  Coverage   94.73%   94.73%           
=======================================
  Files           5        5           
  Lines         152      152           
  Branches       45       45           
=======================================
  Hits          144      144           
  Misses          8        8           

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