@Override
  public int hashCode() {
    return getAddress().hashCode();
  }
This class differs from ServerName in that start code is always ignored. This is because start
code, ServerName.NON_STARTCODE is used to persist favored nodes and keeping this separate from
{@link ServerName} is much cleaner. This should only be used by Favored node specific classes and
should not be used outside favored nodes.
hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/StartcodeAgnosticServerName.java