Move transaction strategy to before each block

spec/support/database_cleaner.rb

@@ -1,11 +1,11 @@
 # See the docs here: https://www.rubydoc.info/github/DatabaseCleaner/database_cleaner
 RSpec.configure do |config|
   config.before(:suite) do
-    DatabaseCleaner.strategy = :transaction
     DatabaseCleaner.clean_with(:truncation)
   end
 
   config.before(:each) do
+    DatabaseCleaner.strategy = :transaction
     DatabaseCleaner.start
   end