lock: Make some cleanup and moving the code around. (#2718)

This patch just avoids lot of ifs and inverts some logic.

cmd/server-mux_test.go

@@ -293,8 +293,8 @@ func generateTestCert(host string) error {
 		Subject: pkix.Name{
 			Organization: []string{"Minio Test Cert"},
 		},
-		NotBefore: time.Now(),
-		NotAfter:  time.Now().Add(time.Minute * 1),
+		NotBefore: time.Now().UTC(),
+		NotAfter:  time.Now().UTC().Add(time.Minute * 1),
 
 		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
 		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},