[FAB-8951]: Move tx vscc validator into sep file

This commit moves tx vscc validator into separate file out of
validator.go

Change-Id: Ie3fb5b5fc2080df9f32393a17b4450f06e2b4c4b
Signed-off-by: Artem Barger <bartem@il.ibm.com>

Author: C0rWin

core/committer/txvalidator/txvalidator_test.go

@@ -33,7 +33,7 @@ import (
 	"github.com/hyperledger/fabric/core/mocks/validator"
 	"github.com/hyperledger/fabric/msp"
 	mspmgmt "github.com/hyperledger/fabric/msp/mgmt"
-	msptesttools "github.com/hyperledger/fabric/msp/mgmt/testtools"
+	"github.com/hyperledger/fabric/msp/mgmt/testtools"
 	"github.com/hyperledger/fabric/protos/common"
 	"github.com/hyperledger/fabric/protos/peer"
 	"github.com/hyperledger/fabric/protos/utils"
@@ -391,7 +391,7 @@ func TestInvalidTXsForUpgradeCC(t *testing.T) {
 	expectTxsFltr.SetFlag(7, peer.TxValidationCode_VALID)
 
 	tValidator := &txValidator{}
-	finalfltr := tValidator.invalidTXsForUpgradeCC(txsChaincodeNames, upgradedChaincodes, txsfltr)
+	tValidator.invalidTXsForUpgradeCC(txsChaincodeNames, upgradedChaincodes, txsfltr)
 
-	assert.EqualValues(t, expectTxsFltr, finalfltr)
+	assert.EqualValues(t, expectTxsFltr, txsfltr)
 }