Bug 156497 [Regression][Acceptance]Report isn't refreshed when delete used library file.
Description: Report isn't refreshed when delete used library file. Steps to reproduce: 1.New a library, add a label, input actuate. 2.New a report, extend lib.label 3.Delete the library file. 4.Refresh the report in Outline of the report Expected result: Empty label in Layout. Actual result: label with content "actuate" in Layout.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/LibraryRecord.java
{
	/**
	 * The position of the library
	 */
	protected int position = -1;
	/**
	 * Whether to add or remove the library.
	 */
	protected boolean add = true;
	/**
	 * The cached overridden values when removing one library.
	 */