Move Relay-Specific Shared Code to One Place (#1193)

* add common libs

* asset hubs

* add westend

* bridge hubs

* collectives

* contracts

* emulated tests

* parachain bin

* delete collectives constants and update docs

* integration tests should have apache license (some missing, some needed changing)

* propagate features

* fmt

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo/tests/tests.rs

@@ -19,7 +19,6 @@
 use bp_polkadot_core::Signature;
 use bridge_hub_rococo_runtime::{
 	bridge_hub_rococo_config, bridge_hub_wococo_config,
-	constants::fee::WeightToFee,
 	xcm_config::{RelayNetwork, XcmConfig},
 	AllPalletsWithoutSystem, BridgeRejectObsoleteHeadersAndMessages, DeliveryRewardInBalance,
 	Executive, ExistentialDeposit, ParachainSystem, PolkadotXcm, RequiredStakeForStakeAndSlash,
@@ -28,7 +27,7 @@ use bridge_hub_rococo_runtime::{
 use codec::{Decode, Encode};
 use frame_support::parameter_types;
 use frame_system::pallet_prelude::HeaderFor;
-use parachains_common::{AccountId, AuraId, Balance};
+use parachains_common::{rococo::fee::WeightToFee, AccountId, AuraId, Balance};
 use sp_keyring::AccountKeyring::Alice;
 use sp_runtime::{
 	generic::{Era, SignedPayload},