public String getValue() {
    return getName();
  }
Gets the value (or principal name pattern) for this KerberosPrincipalDescriptor
<p/>
The value may include variable placeholders to be replaced as needed
<ul>
<li>
${variable} placeholders are replaced on the server - see
{@link VariableReplacementHelper#replaceVariables(String, Map)}
</li>
<li>the _HOST placeholder is replaced on the hosts to dynamically populate the relevant hostname</li>
</ul>

@return a String declaring this principal's value
@see VariableReplacementHelper#replaceVariables(String, Map)
ambari-server/src/main/java/org/apache/ambari/server/state/kerberos/KerberosPrincipalDescriptor.java