@Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    MockDataNodeId dataNode = (MockDataNodeId) o;

    if (portNum != dataNode.portNum) {
      return false;
    }
    return hostname.equals(dataNode.hostname);
  }
Add new mount paths to current datanode.
@param pathsToAdd a list of mount paths to be added onto current node
ambry-test-utils/src/main/java/com/github/ambry/clustermap/MockDataNodeId.java