public String getFile() {
    return getName();
  }
Gets the path to the keytab file
<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>
</ul>

@return a String declaring the keytab file's absolute path
@see VariableReplacementHelper#replaceVariables(String, Map)
ambari-server/src/main/java/org/apache/ambari/server/state/kerberos/KerberosKeytabDescriptor.java