Description of problem:
gidNumber is not an allowed attribute for a non-posix group.  When adding a non-posix group from the UI, unchecking the "Is this a POSIX group?:" box should disable the "GID:" field.

Version-Release number of selected component (if applicable):
ipa-server-2.1.1-101.20111003T0058zgitaaa7c05.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1.  see description
2.
3.

Actual results:
GID box available and entering a gidNumber results in an error

Expected results:
GID box would be disabled if unchecked posix group check box.

Additional info: