public boolean getOperatorFrameworkExecutorEnabled() {
    return getBoolean(JOB_OPERATOR_FRAMEWORK_EXECUTOR_ENABLED, DEFAULT_JOB_OPERATOR_FRAMEWORK_EXECUTOR_ENABLED);
  }
Get config loader factory according to the configs
@return full qualified name of {@link ConfigLoaderFactory}
samza-core/src/main/java/org/apache/samza/config/JobConfig.java