<oo-accept-node> Bug 1000174 - oo-accept-node fixes

https://bugzilla.redhat.com/show_bug.cgi?id=1000174

In check_cgroups_procs: Convert uid string values to integer before
comparisons, test for all defined cgroups controllers (not just all or
memory)

Remove unnecessary call to $USERS.dup

Fix an issue where 3 digit uids would not be verified in
check_cgroups_procs (this is the case for a non-district node wit the
default node.conf)

Update default node.conf values to match the default district values for
min/max uids