Fix inst.MakeMaster() master accessibility check.
Fix inst.MakeMaster() master accessibility check.

The condition on `err` was inverted.

github/orchestrator,pcharlan/orchestrator,PressLabs/orchestrator,BrianIp/orchestrator,BrianIp/orchestrator,github/orchestrator,enisoc/orchestrator,github/orchestrator,orkestrov/orchestrator,orkestrov/orchestrator,pcharlan/orchestrator,pcharlan/orchestrator,github/orchestrator,orkestrov/orchestrator,orkestrov/orchestrator,PressLabs/orchestrator,PressLabs/orchestrator,PressLabs/orchestrator,enisoc/orchestrator,enisoc/orchestrator,pcharlan/orchestrator,enisoc/orchestrator,BrianIp/orchestrator