CLOUDSTACK-4629: UI > Infrastructure > zone > Add UCS Manager > change label from URL to IP Address.
CLOUDSTACK-4619: UI > Infrastructure > zone > Using listApis to check existence of listVmwareDcs API command will show an error in the log when listVmwareDcs API command doesn't exist (in oss build).
So, still use listClusters to determine the existence of listVmwareDcs API command.