Rename ModuleToIndex to PalletRuntimeSetup (#7148)

* Rename `ModuleToIndex` to `PalletRuntimeSetup`

Besides the renaming it also adds support getting the name of a pallet
as configured in the runtime.

* Rename it to `PalletInfo`

* Remove accidentally added files

src/tests.rs

@@ -52,7 +52,7 @@ impl frame_system::Trait for Test {
 	type MaximumBlockLength = MaximumBlockLength;
 	type AvailableBlockRatio = AvailableBlockRatio;
 	type Version = ();
-	type ModuleToIndex = ();
+	type PalletInfo = ();
 	type AccountData = pallet_balances::AccountData<u64>;
 	type OnNewAccount = ();
 	type OnKilledAccount = ();