Bug 186940 Style name in theme cannot be identify by auto when reopen the library[01]
Description: Style name in theme cannot be identify by auto when reopen the library[01] Step: 1.Open a library and add a theme 2.New a style on the theme and use the default name that is "NewStyle" 3.Save the library, close it and reopen it again. 4.New another style on the same theme Actual result: The default style name on second times is also "NewStyle" Exception result: The default style name on second times is "NewStyle1"
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/NameCommand.java
* @param name
	 *            the new name.
	 * @throws NameException
	 *             if the element name is not allowed to change.
	 */
	public void setName( String name ) throws NameException
	{
		name = StringUtil.trimString( name );
		
		String oldName = element.getName( );
		if ( ( name == null && oldName == null )
				|| ( name != null && oldName != null && name.equals( oldName ) ) )
			return;
		checkName( name );
		
		ActivityStack stack = getActivityStack( );
		NameRecord rename = new NameRecord( element, name );
		stack.startTrans( rename.getLabel( ) );
		
		
		stack.execute( rename );
		
		renameSymbolFrom( oldName );
		stack.commit( );
	}
	/**
	 * Checks the current element name. Done when adding a newly created element
	 * where the element name is already set on the new element.
	 * 
	 * @param name