uses of parseInt and parseLong secured
Revert "uses of parseInt and parseLong secured"

This reverts commit f8fb422612f110512fd06ad392bf8896efb3d0b6.
CLOUDSTACK-4346 uses of parseInt and parseLong secured
CLOUDSTACK-4629: UI > Infrastructure > zone > Add UCS Manager > change label from URL to IP Address.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cloudstack.git
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.