JSON tests related changes (#4461)

* test functions take time.Now and other minor changes

* updated remaining test files

* Update validation_test.go

* fix typo

* go fmt

* import time

Co-authored-by: Marko <marbar3778@yahoo.com>

consensus/byzantine_test.go

@@ -54,7 +54,7 @@ func TestByzantine(t *testing.T) {
 		if i == 0 {
 			// NOTE: Now, test validators are MockPV, which by default doesn't
 			// do any safety checks.
-			css[i].privValidator.(*types.MockPV).DisableChecks()
+			css[i].privValidator.(types.MockPV).DisableChecks()
 			css[i].decideProposal = func(j int) func(int64, int) {
 				return func(height int64, round int) {
 					byzantineDecideProposalFunc(t, height, round, css[j], switches[j])

consensus/replay_test.go

@@ -892,7 +892,8 @@ func makeBlock(state sm.State, lastBlock *types.Block, lastBlockMeta *types.Bloc
 			lastBlockMeta.BlockID,
 			state.Validators,
 			privVal,
-			lastBlock.Header.ChainID)
+			lastBlock.Header.ChainID,
+			time.Now())
 		lastCommit = types.NewCommit(vote.Height, vote.Round,
 			lastBlockMeta.BlockID, []types.CommitSig{vote.CommitSig()})
 	}