Group alerts cause traceback in zenactions log

[cluther]

The following traceback is created when an alerting rule for a group is triggered.

Traceback (most recent call last):
  File "/opt/zenoss/Products/ZenEvents/zenactions.py", line 220, in processRules
    self.processEvent(zem, ar, actfunc)
  File "/opt/zenoss/Products/ZenEvents/zenactions.py", line 257, in processEvent
    if action(context, data, False):
  File "/opt/zenoss/Products/ZenEvents/zenactions.py", line 488, in sendEmail
    addr = action.getAddresses()
  File "/opt/zenoss/Products/ZenEvents/ActionRule.py", line 170, in getAddresses
    return self.getUser().getEmailAddresses()
  File "/opt/zenoss/Products/ZenModel/UserSettings.py", line 883, in getEmailAddresses
    for username in self.getMemberUsers():
AttributeError: getMemberUsers

ad8mustanggt from the zenoss-users list also reported this problem: http://community.zenoss.com/forums/viewtopic.php?p=11646#11646

[cluther]

(In [7277]) * Fixes #2224.

[marc]

(In [7420]) Patching r7277 to 2.1.x branch

• refs #2224