Description of the need

Currently most tests are using the Standard profile. This causes lots of unnecessary overhead on each test because most tests only need a few modules installed.

Proposed solution

Change the default profile to one that has fewer tables to copy when setting up a new test prefix.

Additional information

This will probably break tests in contrib. This should be easy to mitigate by setting protected $profile = 'standard'; if you depend on something from the standard profile, but it will require changes from module maintainers.

GitHub Issue #: 
4943