Don't wait for jobs in SmartImportTests

Remove calls to waitForJobs(...) in SmartImportTests and join the
SmartImportJob instead.

Fixes: eclipse-platform#1427
Fixes: eclipse-platform#1807

tests/org.eclipse.ui.tests/Eclipse UI Tests/org/eclipse/ui/tests/datatransfer/SmartImportTests.java

@@ -151,9 +151,7 @@ private void proceedSmartImportWizard(SmartImportWizard wizard, Consumer<SmartIm
 			assertNotNull(okButton);
 			processEventsUntil(() -> okButton.isEnabled(), -1);
 			wizard.performFinish();
-			waitForJobs(100, 1000); // give the job framework time to schedule the job
 			wizard.getImportJob().join();
-			waitForJobs(100, 5000); // give some time for asynchronous workspace jobs to complete
 		} finally {
 			if (!dialog.getShell().isDisposed()) {
 				dialog.close();
@@ -443,9 +441,7 @@ public void testChangedWorkingSets() throws Exception {
 			processEvents();
 			processEventsUntil(() -> okButton.isEnabled(), -1);
 			wizard.performFinish();
-			waitForJobs(100, 1000); // give the job framework time to schedule the job
 			wizard.getImportJob().join();
-			waitForJobs(100, 5000); // give some time for asynchronous workspace jobs to complete
 			assertEquals("WorkingSet2 should be selected", Collections.singleton(workingSet2),
 					page.getSelectedWorkingSets());
 			assertEquals("Projects were not added to working set", 1, workingSet2.getElements().length);