Bug 163749 Import BIRT runtime package to wtp will leave old birt files.
Description: Import BIRT runtime package to wtp will leave old birt files. Steps to reproduce: Prepare two birt builds. 1. Create a new BIRT Web Project with one build. 2. Use another build to open the same workspace, select the project and click Business Inteligent and Reporting Tools->Import BIRT runtime component. Expected result: Old birt runtime package will be replaced with new runtime package. Actual result: Old birt plugins were kept and new birt jar files are imported. e.g. org.eclipse.birt.report.engine_2.2.0.v20061101-0630.jar org.eclipse.birt.report.engine_2.2.0.v20061107-0635.jar
viewer/org.eclipse.birt.integration.wtp.ui/src/org/eclipse/birt/integration/wtp/ui/internal/actions/ImportBirtRuntimeAction.java
/**
	 * Invoke selectionChanged method to check selected project.
	 */
	protected boolean validateSelected( ISelection selection )
	{
		if ( !( selection instanceof IStructuredSelection ) )
			return false;
		fSelection = (IStructuredSelection) selection;
		
		Object selectedProject = fSelection.getFirstElement( );
		if ( selectedProject instanceof IJavaProject )
			selectedProject = ( (IJavaProject) selectedProject ).getProject( );
		
		if ( !( selectedProject instanceof IProject ) )
			return false;
		project = (IProject) selectedProject;
		return isValidProject( project );
	}
	/**
	 * Action dispose implemention
	 * 
	 * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#dispose()
	 */
	public void dispose( )
	{
		
	}
	/**
	 * Execute Action
	 *