Describe the change
The nightly build has been failing since the number of viruses reported in the ClamAV signature database has changed since the test was created. We are not concerned with the number of signatures included in the database, just that they are being loaded as part of the test, so this PR converts the hard coded number to use a mock.ANY statement, which should resolve the nightly build failure.

Describe testing procedures
Tested with local build to ensure that tests still pass.

Sample output
N/A

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of and tested my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings