[#1705] engine/test: Increase evacuation timeout

This test was flaky in CI probably because of runner load fluctuations.
Let's increase the timeout and see if the flakiness goes away.

(close #1705)

Change-Id: I76f96e3d6f4adb3d5de0e27b8ee6b47685236277
Signed-off-by: Vitaliy Potyarkin <v.potyarkin@yadro.com>

pkg/local_object_storage/engine/evacuate_test.go

@@ -208,7 +208,7 @@ func testWaitForEvacuationCompleted(t *testing.T, e *StorageEngine) *EvacuationS
 		st, err = e.GetEvacuationState(context.Background())
 		require.NoError(t, err)
 		return st.ProcessingStatus() == EvacuateProcessStateCompleted
-	}, 3*time.Second, 10*time.Millisecond)
+	}, 6*time.Second, 10*time.Millisecond)
 	return st
 }