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/wizards/BirtWizardUtil.java
* Returns the file content
	 * 
	 * @param filename
	 * @param pluginId
	 * @return
	 */
	public static String readFile( String filename, String pluginId )
			throws CoreException
	{
		
		File file = getFileFromPluginDir( filename, pluginId );
		try
		{
			
			FileReader reader = new FileReader( file );
			StringBuffer sbuf = new StringBuffer( );
			char[] cbuf = new char[512];
			int len = 0;
			while ( ( len = reader.read( cbuf ) ) != -1 )
			{
				sbuf.append( cbuf, 0, len );
			}
			reader.close( );
			return sbuf.toString( );
		}
		catch ( Exception e )
		{
			
			Logger.logException( e );
			throw BirtCoreException.getException( null, e );