Title: Image Load Flow
* vcld daemon is running
** polls database every 12 seconds to check if the management node has any
reservations which need to be processed
* vcld finds a reservation that needs to be processed
* vcld gathers all of the information for the reservation from the database
by calling utils.pm::get_request_info() and then a DataStructure object is
created
* vcld creates a new state object
** a new state object is created based on the request.stateid column for
the reservation
** the main state modules are new.pm, image.pm, reserved.pm, reclaim.pm
* the constructor for all of the state modules is Module.pm::new()
* this constructor automatically calls an initialize() subroutine if
initialize() has been implemented for the class being constructed
* State.pm contains an initialize() subroutine, and all of the state
modules (new.pm, image.pm...) inherit from State.pm so the initialize()
subroutine in State.pm is automatically called when vcld creates the state
object
* State.pm::initialize() creates an OS object based on the OS of
the image assigned to the reservation
* State.pm::initialize() creates a provisioning engin object based on
the provisioning engine of the computer assigned to the reservation
* vcld forks a new process for the newly created state object 
* the new process calls the state module's process() subroutine
* process() performs all of the tasks needed to process the reservation,
returns true if successful, false if failed