Update Database to support maintaining history of records.
Enable groups to be expired instead of deleting from the GROUP_INFO
table.
Add a flag in MEMBER table to indicate, if the member is still active
in the Group.
Modify Delete Member service, to not to allow nurse to delete Patient,
when there are other members in the Group.
Merge branch 'master' of https://github.com/nancywatta/HealthConnect

Conflicts:

HealthConnectServer/HealthConnect/src/main/java/aucklanduni/ece/hc/repos
itory/model/Appointment.java