[FAB-10501] Log VSCCValidateTxForCC message at debug

This CR changes the log level for the message in VSCCValidateTxForCC
from INFO to DEBUG to remove the unnecessary noise at the info
level. It also fixes a minor golint issue.

Change-Id: I72d5de621ca04191cc90a8a29a19cb295e021732
Signed-off-by: Will Lahti <wtlahti@us.ibm.com>

Author: wlahti

core/committer/txvalidator/vscc_validator.go

@@ -26,8 +26,8 @@ import (
 	"github.com/pkg/errors"
 )
 
-// vsccValidator implementation which used to call
-// vscc chaincode and validate block transactions
+// VsccValidatorImpl is the implementation used to call
+// the vscc chaincode and validate block transactions
 type VsccValidatorImpl struct {
 	support         Support
 	sccprovider     sysccprovider.SystemChaincodeProvider
@@ -258,7 +258,7 @@ func (v *VsccValidatorImpl) VSCCValidateTx(seq int, payload *common.Payload, env
 }
 
 func (v *VsccValidatorImpl) VSCCValidateTxForCC(ctx *Context) error {
-	logger.Info("Validating", ctx, "with plugin")
+	logger.Debug("Validating", ctx, "with plugin")
 	err := v.pluginValidator.ValidateWithPlugin(ctx)
 	if err == nil {
 		return nil