Skip system collections at mongo-level rather than using `reject` Relaxed regexp: skips collections like `<database_name>.$cmd`
Skip system collections at mongo-level rather than using `reject`
Relaxed regexp: skips collections like `<database_name>.$cmd`

yangc5/playlister-sinatra-v-000,yangc5/playlister-sinatra-v-000,simonmorley/database_cleaner,eliotsykes/database_cleaner,yangc5/playlister-sinatra-v-000,DatabaseCleaner/database_cleaner,fajrif/database_cleaner,awilkening/database_cleaner,yangc5/playlister-sinatra-v-000,yangc5/playlister-sinatra-v-000,glebtv/database_cleaner,yangc5/playlister-sinatra-v-000,amorphid/database_cleaner,DatabaseCleaner/database_cleaner,yangc5/playlister-sinatra-v-000,reinaris/database_cleaner,ericraio/database_cleaner,custora/database_cleaner