[fix bug 1168209] Exclude alumni users from email notifications.
[fix bug 1168209] Exclude alumni users from email notifications.

flamingspaz/remo,johngian/remo,mozilla/remo,johngian/remo,akatsoulas/remo,flamingspaz/remo,akatsoulas/remo,tsmrachel/remo,Mte90/remo,flamingspaz/remo,abdullah2891/remo,mozilla/remo,mozilla/remo,flamingspaz/remo,chirilo/remo,tsmrachel/remo,tsmrachel/remo,akatsoulas/remo,akatsoulas/remo,Mte90/remo,Mte90/remo,Mte90/remo,abdullah2891/remo,tsmrachel/remo,chirilo/remo,johngian/remo,abdullah2891/remo,chirilo/remo,johngian/remo,abdullah2891/remo,mozilla/remo,chirilo/remo