Hi,
Yes, they are. The hbase.quota.enabled property is not displayed in CDH. It must be added via a safety valve snippet under "Hbase Service Advanced Configuration Snippet (Safety Valve) for hbase-site.xml" in the HBase Configuration tab.
Name: hbase.quota.enabled
Value: true
Description: Enable hbase quotas
Also note that to then deploy the change requires a restart of multiple services, such as Impala, CDSW etc
EDIT: I'm using CDH 6.2
Evan