cli: fix TestAwaitUtilCancelTx failing

Occasionally the block is being accepted right after main transaction
submission. Added two branches into this TestAwaitUtilCancelTx. One
branch handles the case of original transaction acceptance, the
other branch handles the conflicting transaction acceptance.

Close #3365

Signed-off-by: Ekaterina Pavlova <ekt@morphbits.io>

cli/util/util_test.go

@@ -3,6 +3,7 @@ package util_test
 import (
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 	"time"
 
@@ -169,11 +170,22 @@ func TestAwaitUtilCancelTx(t *testing.T) {
 
 	e.In.WriteString("one\r")
 	e.Run(t, append(args, txHash.StringLE())...)
-	e.CheckNextLine(t, "Conflicting transaction accepted")
-	resHash, _ := e.CheckAwaitableTxPersisted(t)
 
+	response := e.GetNextLine(t)
+	if strings.Contains(response, "Conflicting transaction accepted") {
+		resHash, _ := e.CheckAwaitableTxPersisted(t)
 		require.Eventually(t, func() bool {
 			_, aerErr := e.Chain.GetAppExecResults(resHash.Hash(), trigger.Application)
 			return aerErr == nil
 		}, time.Second*2, time.Millisecond*50)
+	} else if strings.Contains(response, "Target transaction accepted") {
+		require.Eventually(t, func() bool {
+			_, _, err := e.Chain.GetTransaction(txHash)
+			require.NoError(t, err, "original transaction should be on chain")
+			_, aerErr := e.Chain.GetAppExecResults(txHash, trigger.Application)
+			return aerErr == nil
+		}, time.Second*2, time.Millisecond*50)
+	} else {
+		t.Fatalf("unexpected response: %s", response)
+	}
 }