fixes FTR to delay tx chunk reading

tests/com.minres.scviewer.database.test/inputs/my_db.vcd

@@ -1,5 +1,5 @@
 $date
-     Mar 04, 2023       11:00:53
+     Mar 04, 2023       15:07:04
 $end
 
 $version

tests/com.minres.scviewer.database.test/src/com/minres/scviewer/database/test/DatabaseServicesTest.java

@@ -80,6 +80,7 @@ public class DatabaseServicesTest {
 		assertTrue(f.exists());
 		waveformDb.load(f);
 		assertNotNull(waveformDb);
+		assertEquals(3400000000l, waveformDb.getMaxTime());
 		List<IWaveform> waveforms =  waveformDb.getAllWaves();
 		assertEquals(8,  waveforms.size());
 		assertEquals(1,  waveformDb.getChildNodes().size());
@@ -120,6 +121,7 @@ public class DatabaseServicesTest {
 		assertTrue(f.exists());
 		waveformDb.load(f);
 		assertNotNull(waveformDb);
+		assertEquals(3400000000l, waveformDb.getMaxTime());
 		List<IWaveform> waveforms =  waveformDb.getAllWaves();
 		assertEquals(8,  waveforms.size());
 		assertEquals(1,  waveformDb.getChildNodes().size());
@@ -155,6 +157,7 @@ public class DatabaseServicesTest {
 		waveformDb.load(f);
 		assertNotNull(waveformDb);
 		List<IWaveform> waveforms =  waveformDb.getAllWaves();
+		assertEquals(3400000000l, waveformDb.getMaxTime());
 		assertEquals(8,  waveforms.size());
 		assertEquals(1,  waveformDb.getChildNodes().size());
 		for(IWaveform w:waveforms) {