public ConfigureDaemons withReplace(boolean replace) {
      this.replace = replace;
      return this;
    }
Replace the existing hadoop-user-env.sh file if it exists.
@param replace whether the file should be replaced.
@return A reference to this updated object so that method calls can be chained
        together.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/util/BootstrapActions.java