public String getValueFromDesiredConfigurations(final String configType, final String propertyName) {
    return m_configHelper.getValueFromDesiredConfigurations(m_cluster, configType, propertyName);
  }
Find Config value for current Cluster using configType and propertyName

@param configType   Config Type
@param propertyName Property Name
@return Value of property if present else null
ambari-server/src/main/java/org/apache/ambari/server/stack/MasterHostResolver.java