Additional EDA on TestGrid Data set

[MichaelClifford]

To close issue #15 and build upon the initial EDA work done in #16 there are a number of additional questions that we would like answered about the TestGrid dataset. Specifically:

• How comparable are the testgrids?
• How do we analyze them in aggregate to learn from their combined behavior?
• How many/ which tests do they all have in common?
• Are their time series dates comparable?
• Are there sub-groups that should only be compared with one another?
• Is looking at the grid matrices independent of test names a valid approach for issue identification?
• What is the expected behavior of a test over time across multiple jobs.
• How does the entire test platform/specific tests perform on a given day?
• How does the entire test platform behavior evolve over time.
• Is there sufficient data here for useful ML approaches?
• Can we develop some meaningful alerting/ problem identification with the results of the above questions?

Acceptance Criteria:

• Notebook that address the questions above.