Bug 197228 Need updaet createdBy info when serialize the module
When open module, designer will pass the property map which contains the createdBy info. this info should be retained by moduleHandle and then be updated and written when doing serialization. Note if this info is null, model should not update it during serialization. This could happen for api users or third-party designer. For BIRT designer, it will guarantee this value always not null.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
return null;
		IncludedLibrary includedItem = null;
		for ( int i = 0; i < libs.size( ); i++ )
		{
			IncludedLibrary incluedLib = (IncludedLibrary) libs.get( i );
			if ( incluedLib.getNamespace( ).equalsIgnoreCase( namespace ) )
			{
				includedItem = incluedLib;
				break;
			}
		}
		return includedItem;
	}
	/**
	 * Gets the library with the given location path in native level.
	 * 
	 * @param theLocation
	 *            the location path to find
	 * @return the library with the given location path if found, otherwise null
	 */
	public Library getLibraryByLocation( String theLocation )
	{
		return getLibraryByLocation( theLocation,
				IAccessControl.DIRECTLY_INCLUDED_LEVEL );
	}
	/**
	 * Gets the library with the given location path in given level.
	 * 
	 * @param theLocation
	 *            the location path to find