@Override
    public String getHttpMethod() {
        return "POST";
    }
Adds the specified service component to the specified service.

@param params - Ambari server connection information.
@param clusterName - Existing cluster name.
@param serviceName - Existing service name.
@param componentName - Component to be added to a service.
ambari-funtest/src/test/java/org/apache/ambari/funtest/server/api/servicecomponent/AddServiceComponentWebRequest.java