[testnets][xcm-emulator] add bridge-hub-westend and hook it up to emulator (#2204)

`bridge-hub-westend-runtime` was added to cumulus/parachains, but wasn't
hooked up to xcm-emulator to run tests against it.

This commit addresses that ^.

Signed-off-by: Adrian Catangiu <adrian@parity.io>

Cargo.lock

@@ -2298,6 +2298,35 @@ dependencies = [
  "staging-xcm-executor",
 ]
 
+[[package]]
+name = "bridge-hub-westend-integration-tests"
+version = "1.0.0"
+dependencies = [
+ "asset-test-utils",
+ "bp-messages",
+ "bridge-hub-westend-runtime",
+ "cumulus-pallet-dmp-queue",
+ "cumulus-pallet-xcmp-queue",
+ "frame-support",
+ "frame-system",
+ "integration-tests-common",
+ "pallet-assets",
+ "pallet-balances",
+ "pallet-bridge-messages",
+ "pallet-message-queue",
+ "pallet-xcm",
+ "parachains-common",
+ "parity-scale-codec",
+ "polkadot-core-primitives",
+ "polkadot-parachain-primitives",
+ "polkadot-runtime-parachains",
+ "sp-core",
+ "sp-weights",
+ "staging-xcm",
+ "staging-xcm-executor",
+ "xcm-emulator",
+]
+
 [[package]]
 name = "bridge-hub-westend-runtime"
 version = "0.1.0"
@@ -6717,6 +6746,7 @@ dependencies = [
  "bridge-hub-kusama-runtime",
  "bridge-hub-polkadot-runtime",
  "bridge-hub-rococo-runtime",
+ "bridge-hub-westend-runtime",
  "bridge-runtime-common",
  "collectives-polkadot-runtime",
  "cumulus-pallet-parachain-system",