Fix integration tests

[jtcohen6]

• Disable Synapse + Azure SQL integration tests for now (cc @swanderz, I don't quite know what's going on here)
• Reorganize integration test source + test definitions so that unused tests can be disabled (thereby avoiding warning)
• Fix Snowflake auto_refresh logic (changed in #105)
• Adjust printer width for easier visual inspection on CLI. Fancier CLI cleanup to come in the official v1.0-compatible minor version release
• Databricks tests still aren't running on v1.0, this is blocked by a need to upgrade our ODBC driver image to a newer version of python (it's currently py36). That's also blocking work in spark-utils.

Checklist

• [x] I have verified that these changes work locally
• ~I have updated the README.md (if applicable)~
• ~I have added an integration test for my fix/feature (if applicable)~

[jtcohen6]

This is incomplete, but it's at least enough to get tests passing so that I can review other PRs