Constructor for this class
This method sets up the LfnFileResolver internal data structures, to enable it to extract the physical file attributes from the lfns.
The setup method reads the following files:
- plan file
- gatekeeper file
From the plan file, this method retrieves the logical filenames,
resolves these to the actual physical file location, retrieves the file
attributes for each file and sets up the datafiles and datahosts tables
The plan file contents are also used to prepare the jobs to be scheduled
From the gatekeeper file, the compute servers are discovered and probed.
The variable values for the job are stord in a hashtable in the form of name value pairs
This function passes a hashtable to be used as the variable storage..