voided patients prevent displaying the appointment view

[deniger]

1. Add an appointment for a patient on day d
2. Void the patient
3. go back to the appointment view and display them on day d
4. Error occured

Same error if a patient is "merged"

[pedroedrasousa]

Created ticked on Bahmni jira: https://bahmni.atlassian.net/browse/BAH-1209