and replace mock_package_sql by a mock_import_swhmodule fixture in favor
of using the stock get_sql_for_package() function (on the mock module
returned by mock_import_swhmodule).
This also comes with a change in expected test data structure for sql
script; the tests/data/<mod> is now expected to store the sql script
files in a dedicated sql/ sub directory instead of having them
directly in the <mod> directory so that the get_sql_for_package() can
be used in tests unmocked.
Depends on D7155