Execs a version operation using a default user credentials
It means that the node relevant to the version operation is versioned only
if it is versionable; if the node isn't versionable, an OperationExecutionException is thrown.
Execs a version operation using a specific user name and password
It means that the node relevant to the version operation is versioned only
if it is versionable; if the node isn't versionable, an OperationExecutionException is thrown.
The method searches the properties specified inside an operation descriptor
and it returns an Hashtable containing a couple of name and CmsProperty object
for each property defined.