Bug 998704: Throttler throws NoMethodError

https://bugzilla.redhat.com/show_bug.cgi?id=998704

I cannot reproduce this, but since '>=' is only used in 2 places, we
know where it should be occurring.
I believe this is a corner case where we are checking utilization during
an unstable part of gear creation/deletion.
This should be ok to ignore, but we will add some debugging information
just in case.