1953 defensive testing extrinsic (#1998)

# Description

The `trigger_defensive` call has been added to the `root-testing`
pallet. The idea is to have this pallet running on `Rococo/Westend` and
use it to verify if the runtime monitoring works end-to-end.

To accomplish this, `trigger_defensive` dispatches an event when it is
called.

Closes #1953

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✄
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Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

polkadot/runtime/westend/src/lib.rs

@@ -1349,6 +1349,10 @@ impl pallet_nomination_pools::Config for Runtime {
 	type MaxPointsToBalance = MaxPointsToBalance;
 }
 
+impl pallet_root_testing::Config for Runtime {
+	type RuntimeEvent = RuntimeEvent;
+}
+
 parameter_types! {
 	// The deposit configuration for the singed migration. Specially if you want to allow any signed account to do the migration (see `SignedFilter`, these deposits should be high)
 	pub const MigrationSignedDepositPerItem: Balance = 1 * CENTS;
@@ -1483,6 +1487,9 @@ construct_runtime! {
 
 		// Asset rate.
 		AssetRate: pallet_asset_rate::{Pallet, Call, Storage, Event<T>} = 101,
+
+		// Root testing pallet.
+		RootTesting: pallet_root_testing::{Pallet, Call, Storage, Event<T>} = 102,
 	}
 }