code: public List<ExtPluginConfiguration> listPluginConfigurations(
              final String keyprefix,
              final String serviceName,
              boolean extra
      )
      {
          return listPluginConfigurations(projectConfig.getProjectProperties(), keyprefix, serviceName, extra);
      }
docs: Return a list of resource model configuration
  
  @param serviceName
  @param keyprefix   prefix for properties
  @return List of Maps, each map containing "type": String, "props":Properties