Update exceptions

[jbrown-xentity]

Reformat and add exceptions

It's important to note here: .snyk file format expects the exceptions to be in the following format (note the strange double tab from '*' to the next lines). Note that if the second tab isn't there, the exception is ignored without a reason AND WITHOUT AN EXPIRATION DATE, which breaks our O&M scanning workflow of reviewing old exceptions for new fixes/mitigations (we want them to expire, so that we see if a fix is available).

If you are ever writing snyk exceptions and are unsure of the format, you can use the snyk cli to do it for you (see "Snyk Ignore")...

ignore:
  SNYK-PYTHON-SQLALCHEMY-173678:
    - '*':
        reason: >-
          No remediation path available (cannot upgrade to SQLAlchemy 1.2). 
          Reviewed group_by and order_by usage manually, all user input sanitized.
        expires: 2020-11-20T06:00:00.000Z

[FuhuXia]

good to know.