Description of problem:
In some error messages, occurred is spelled occured

Version-Release number of selected component (if applicable):
ipa-server-2.0-2.20090428.el5ipa

How reproducible:
always

Steps to Reproduce:
1. run ipa group-mod --add user1 group1
It's right at  the end of the actual example.
 
Actual results:
[root@iparhel5-vma ~]# ipa group-mod --add user1 group1
Traceback (most recent call last):
<blah blah blah>
SystemExit: 2
ipa: ERROR: an internal error has occured