Later versions of RHV 4.1 dropped ntpd as a dependency from VDSM in favor of chrony. Earlier versions, however, had included ntpd and users had come to rely on it for time configuration. When the dependency was dropped, RHVH no longer included ntpd.
Now, RHVH images once more include ntpd. As a result, ntpd configurations from earlier versions of RHV will continue to work.