private static int addStandardComponents(int i, StringBuilder builder) {
        addComponent(ExecutionFactory.class.getName(), i++, builder);
        return i;
    }
Copies the component ids from another config, e.g. 'handlers' to a 'components' array in a new components file,
to avoid a manually written 'components' file for tests where the bundle spec is given by the component id.

@param configFile  Full path to the original config file, e.g. 'handlers'
@param componentsFile  Full path to the new 'components' file
@param componentType   The type of component, e.g. 'handler'
@param append  'true' will append to an already existing 'componentsFile'
container-search/src/test/java/com/yahoo/search/searchchain/config/test/SearchChainConfigurerTestCase.java