default SystemAdmin getAdmin(String systemName, Config config, String adminLabel) {
    return getAdmin(systemName, config);
  }
This function provides an extra input parameter to {@link #getAdmin}, which can be used to provide extra
information for the admin instance, e.g. ownership of client instance, to help better identify admins in logs,
threads and client instances etc., along with other relevant information like systemName.

@param systemName The name of the system to create admin for.
@param config The config to create admin with.
@param adminLabel a string to provide info for the admin instance.
@return A SystemAdmin
samza-api/src/main/java/org/apache/samza/system/SystemFactory.java