Fix credo warnings

diff --git a/test/backup_test.exs b/test/pleroma/backup_test.exs
similarity index 100%
rename from test/backup_test.exs
rename to test/pleroma/backup_test.exs

diff --git a/test/web/pleroma_api/controllers/backup_controller_test.exs b/test/pleroma/web/pleroma_api/controllers/backup_controller_test.exs
similarity index 100%
rename from test/web/pleroma_api/controllers/backup_controller_test.exs
rename to test/pleroma/web/pleroma_api/controllers/backup_controller_test.exs