System properties are derived from the CDAP configuration. Anything in the CDAP configuration that is prefixed by
'provisioner.system.properties.[provisioner-name].' will be adding as an entry in the system properties.
For example, if the provisioner is named 'abc', and there is a configuration property
'provisioner.system.properties.abc.retry.timeout' with value '60', the system properties map will contain
a key 'retry.timeout' with value '60'. System properties are not visible to end users and cannot be overwritten
by end users.
unmodifiable system properties for the provisioner