Bug 122687 Libraries dont appear to allow background colors on tables to be used
If I create a table and set the background color to blue in my library and then drag the table from the library to the report the background color does not go with it.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
return getPropertyFromSelector( module, prop, selector );
	}
	/**
	 * Returns the property value which is related to slot selector. It is from
	 * the selector style which represents the slot or combination of container
	 * and slot.
	 * 
	 * @param module
	 *            the module
	 * @param prop
	 *            the definition of property
	 * @return the property value, or null if no value is set.
	 */
	protected Object getPropertyFromSlotSelector( Module module,
			ElementPropertyDefn prop )
	{
		if ( getContainer( ) == null )
			return null;
		String selector = getContainer( ).getSelector( getContainerSlot( ) );
		return getPropertyFromSelector( module, prop, selector );
	}
	/**
	 * Returns the property value which is related to container.
	 * 
	 * @param module
	 *            the module
	 * @param prop
	 *            the definition of property
	 * @return the property value, or null if no value is set.
	 */