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>

blockchain/v0/reactor_test.go

@@ -97,7 +97,9 @@ func newBlockchainReactor(
 				lastBlockMeta.BlockID,
 				state.Validators,
 				privVals[0],
-				lastBlock.Header.ChainID)
+				lastBlock.Header.ChainID,
+				time.Now(),
+			)
 			if err != nil {
 				panic(err)
 			}

blockchain/v2/reactor_test.go

@@ -6,6 +6,7 @@ import (
 	"sort"
 	"sync"
 	"testing"
+	"time"
 
 	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
@@ -494,7 +495,9 @@ func newReactorStore(
 				lastBlockMeta.BlockID,
 				state.Validators,
 				privVals[0],
-				lastBlock.Header.ChainID)
+				lastBlock.Header.ChainID,
+				time.Now(),
+			)
 			if err != nil {
 				panic(err)
 			}