Bug 205709 Translation table is missed when report design is flattened
It happens when a report design with a localization property file and some library (otherwise it's not flattened!) is executed. Such report document has no transaltion table and then can not be localized. The problem is in org.eclipse.birt.report.model.util.ReportDesignSerializer#visitReportDesign which does not copy the translation table from ReportDesignSerializer#sourceDesign to ReportDesignSerializer#targetDesign.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/writer/DocumentUtilTest.java
{
	/**
	 * Design file name, which tests the element property value localization.
	 */
	private static final String DESIGN_WITH_ELEMENT_EXTENDS = "DocumentUtilTest.xml"; 
	/**
	 * Design file name, which tests the lib reference with library structures.
	 */
	private static final String DESIGN_WITH_STRUCTURE_REFERENCE = "DocumentUtilTest_1.xml"; 
	/**
	 * Design file name, which tests indirect element reference of library
	 * elements by inheritance.