To integrate pallet-auction, we need to copy and paste the following code
https://github.com/paritytech/polkadot/tree/master/runtime/common/src

• slots
• assigned-slots
• para_registrar
• auctions
• para_sudo_wrapper
• [] crowdloan (needn't)

These pallets are not standardized pallets presented in substrate/frame, it follows polakdot repository.
However, the code inside runtime/common/src also contains other pallets' configuration.
We need to pick up auction, slot, etc, from runtime/common/src.

However, as for internal testing, currently integrated pallets are enough for the apps team to do tests.