Check block CLI command (#4240)

* Check block operation

* Update client/cli/src/lib.rs

* Update client/cli/src/params.rs

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

@@ -659,6 +659,7 @@ pub mod tests {
 			auxiliary: Vec::new(),
 			fork_choice: ForkChoiceStrategy::LongestChain,
 			allow_missing_state: true,
+			import_existing: false,
 		};
 		do_import_block::<_, _, _, TestJustification>(
 			&client,

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

@@ -975,6 +975,7 @@ fn allows_reimporting_change_blocks() {
 			auxiliary: Vec::new(),
 			fork_choice: ForkChoiceStrategy::LongestChain,
 			allow_missing_state: false,
+			import_existing: false,
 		}
 	};
 
@@ -1028,6 +1029,7 @@ fn test_bad_justification() {
 			auxiliary: Vec::new(),
 			fork_choice: ForkChoiceStrategy::LongestChain,
 			allow_missing_state: false,
+			import_existing: false,
 		}
 	};
 
@@ -1738,6 +1740,7 @@ fn imports_justification_for_regular_blocks_on_import() {
 		auxiliary: Vec::new(),
 		fork_choice: ForkChoiceStrategy::LongestChain,
 		allow_missing_state: false,
+		import_existing: false,
 	};
 
 	assert_eq!(