Test the master and slave failure scenarios

[elingg]

• Framework reregisters after all slaves have reregistered
• Framework reregisters before some/all slaves reregister (needs reconciliation retries)
• Framework reregisters, but some slaves never reregister (failed)
• Mesos master fails over again, after previous reconciliation completed, starts new reconciliation
• Mesos master fails over again, during the middle of an existing reconciliation