Implement Master API

[oubiwann]

Functions required:

• [ ] Master Protocol
  • [ ] bring-down-machines
  • [ ] bring-up-machines
  • [ ] create-volumes
  • [ ] destroy-volumes
  • [ ] get-agents
  • [ ] get-frameworks
  • [ ] get-maintenance-schedule
  • [ ] get-maintenance-status
  • [ ] get-quota
  • [ ] get-registry
  • [ ] get-roles
  • [ ] get-state-summary
  • [ ] get-tasks
  • [ ] redirect
  • [ ] remove-quota
  • [ ] reserve
  • [ ] set-quota
  • [ ] teardown-framework
  • [ ] unreserve
  • [ ] update-maintenance-scheduler
  • [ ] update-role-weights
• [ ] Config Protocol
  • [x] get-version
  • [ ] get-flags
• [ ] Debug Protocol
  • [ ] start-profiler
  • [ ] stop-profiler
• [ ] Files Protocol
  • [ ] browse
  • [ ] debug
  • [ ] download
  • [ ] read
• [ ] Health Protocol
  • [ ] get-health
  • [ ] get-metrics
  • [ ] get-state
  • [ ] get-system-stats

Part of epic #2