[Bug] Broken tSQLt test for data sensitivity classification in sp_doc

[lowlydba]

Describe the bug
For an unknown reason, when running the (now commented out) unit test for sp_doc regarding data sensitivity classifications, the query always times out (up to 10 minutes) in appveyor.

To Reproduce
I can't reproduce it locally OR when RDP'd into the Appveyor machine, but will try the latter again in a dedicated branch. Might have to do with a recent CU applied to 2019?

Expected behavior
The unit test runs in a reasonable amount of time (few seconds).

Versions(please complete the following information):

• OS: Windows
• SQL Server: 2019
• SSMS: N/A

Additional context
It used to work and nothing in that particular test has changed recently.

[lowlydba]

See the pull request for details on this fix.