create delayed slice

[theBowja]

Idea: a delayed slice will create a slice from the snapshot of a topology at the time of the scheduled resources' reservation. The workflow should still be the same (create topology -> create slice -> reserve resources to slice -> stitch resources to stitchports).

Details/Projected Changes:

• 'create slice' page will have 'delayed' option
  • there will be a placeholder for the delayed slice when selecting a slice on the 'scheduler' page
• slice column in 'organizer' page will be split between active and delayed.
  • 'active' should show expiration date and 'delayed' should show creation date
• in the timer used to stitch resources to active slices, should be a function to create the slice if it is a delayed slice
• when a slice is created at the 'create slice' page, a snapshot of the topology will be saved and can be referenced.

[theBowja]

Objectives

• delayed slice schema
  • 'delayed' option for creating slice
• keep a snapshot of the topology (deleted when slice expires)
• create timer that stitches resources to the slice at the time of reservation
  • if the slice is a delayed slice, then it should first create the slice
• improve 'organizer' page to reflect changes