The COPS domain which this client type belongs to.
This is so that a COPS server supporting multiple domains
can push the correct set of domain policies to this device.
Zero length name is default. COPS server have a default
set of policies for clients who have zero length domain
names.
Changing the COPS domain name while qosPolicySource is cops(2)
will result in requesting new policies from the cops server and
configuring the device with those new policies. The value of
ccopsDomainName is ignored if qosPolicySource is local(1).