[FAB-12464] z build failing due to Integration error

	It seems the z build returns a deterministic random value
	when calling rand.Intn(n) which results in tests generating
	the same values for install/instantiate CCs.

	This fix adds a time based seed to ensure the random value
	is non deterministic

Change-Id: I88dd8a31bca6acd563b41ca68ba5e9c0d03784be
Signed-off-by: Baha Shaaban <baha.shaaban@securekey.com>

Author: Baha Shaaban

ci.properties

@@ -1,3 +1,9 @@
+#
+# Copyright SecureKey Technologies Inc. All Rights Reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
 GO_VER=1.10
 GO_MIN_VER=1.10
 GO_MAX_VER=1.10.4

test/integration/utils.go

@@ -12,6 +12,7 @@ import (
 	"os"
 	"strings"
 	"testing"
+	"time"
 
 	mspclient "github.com/hyperledger/fabric-sdk-go/pkg/client/msp"
 	"github.com/hyperledger/fabric-sdk-go/pkg/client/resmgmt"
@@ -40,8 +41,10 @@ func GenerateRandomID() string {
 func randomString(strlen int) string {
 	const chars = "abcdefghijklmnopqrstuvwxyz0123456789"
 	result := make([]byte, strlen)
+	seed := rand.NewSource(time.Now().UnixNano())
+	rnd := rand.New(seed)
 	for i := 0; i < strlen; i++ {
-		result[i] = chars[rand.Intn(len(chars))]
+		result[i] = chars[rnd.Intn(len(chars))]
 	}
 	return string(result)
 }