Default to numeric users/groups

[dclark]

Numeric users and groups should be used by default in all Bcfg2 code, as there is no guarantee that UID 0 or GID 0 will be named "root". On AIX, GID 0 is named "system", so this causes permissions verifications to fail on AIX, which causes machines to show up as dirty.

If not already possible users should also be able to use numeric UID and GID values in info/:info files.

Attached is a patch (that doesn't actually work) that shows all the places in the code I could find the behavior for groups.

Fixing this bug is critical for Bcfg2 to support AIX.

[dclark]

Places in the code that refer to the group root

[dclark]

I think this is fixed in r3409 and r3411 - need to test to make sure you can use numbers for owner/user and group in :info/info files, but tested AIX failure case and with these changes on GNU/Linux and Solaris, and everything seemed to work fine.

[desai]

Per conversation on irc, i think that we are now set.