Implement runtime version checks in set_code (#4548)

* Implement runtime version checks in `set_code`

Check that the new runtime code given to `set_code` fullfills some
requirements:

- `spec_name` matches
- `spec_version` does not decreases
- `impl_version` does not decreases
- Either `spec_version` and `impl_version` increase

* Make tests almost work

* Some fixes after master merge

* Fix tests

* Add missed file

* Make depedency check happy?

* Remove leftover `sc-executor`

* AHHHHH

* Reset debug stuff

* Remove some 'static

* More 'static

* Some docs

* Update `Cargo.lock`

substrate/client/finality-grandpa/src/lib.rs

@@ -372,7 +372,7 @@ pub trait GenesisAuthoritySetProvider<Block: BlockT> {
 impl<B, E, Block: BlockT, RA> GenesisAuthoritySetProvider<Block> for Client<B, E, Block, RA>
 	where
 		B: Backend<Block> + Send + Sync + 'static,
-		E: CallExecutor<Block> + 'static + Clone + Send + Sync,
+		E: CallExecutor<Block> + Send + Sync,
 		RA: Send + Sync,
 {
 	fn get(&self) -> Result<AuthorityList, ClientError> {
@@ -408,7 +408,7 @@ pub fn block_import<B, E, Block: BlockT, RA, SC>(
 	), ClientError>
 where
 	B: Backend<Block> + 'static,
-	E: CallExecutor<Block> + 'static + Clone + Send + Sync,
+	E: CallExecutor<Block> + Send + Sync,
 	RA: Send + Sync,
 	SC: SelectChain<Block>,
 	Client<B, E, Block, RA>: AuxStore,