CppEditor: Fix race condition in test

Opening an editor starts a new parser, so we must do that before we wait
for the parsing to finish.

Change-Id: Iee9da8da1fb60bf496a093d8efd878101d91f53f
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/cppeditor/cppincludehierarchy_test.cpp

@@ -92,15 +92,15 @@ public:
             filePaths << absoluteFilePath;
         }
 
-        // Update Code Model
-        QVERIFY(parseFiles(filePaths));
-
         // Open Editor
         const QString fileName = temporaryDir.path() + QLatin1String("/file1.h");
         CppEditor *editor;
         QVERIFY(openCppEditor(fileName, &editor));
         closeEditorAtEndOfTestCase(editor);
 
+        // Update Code Model
+        QVERIFY(parseFiles(filePaths));
+
         // Test model
         CppIncludeHierarchyModel model;
         model.buildHierarchy(editor->document()->filePath().toString());