Python -- try to add some common packages to the ottr_python Dockerfile

[kweav]

Added a pip3 install command as described in the OTTR documentation. Specifically adding these packages per Chris's request: pandas, matplotlib, seaborn, numpy, plotnine, scikit-learn, & scipy. Currently no version is specified so latest versions are being installed. Will test and specify versions later once we've verified these work.

[kweav]

I tried to follow the OTTR documentation steps to test the dockerfile locally and it failed with a message of "denied: requested access to the resource is denied" once I was on the docker push step. It worked prior to that. I don't think I can use the Test build of Dockerfile GitHub Actions instructions because I don't see that workflow in the repo of interest. Please advise how I should test it further @cansavvy

[cansavvy]

This builds correctly and seems reasonable.

1. Let's merge this now
2. Push to dockerhub with a tag like ottr_python:test using "Manual build" GitHub action
3. Test that it makes Chris's test case work (change config_automation.yml docker designation as needed).
4. Push the image again to dockerhub but with the main tag ottr_python:main using "Manual build" GitHub action

[kweav]

Great will try this! Thank you!