Currently, if the number of neutron resources requested reaches
the quota, kuryr-controller is marked as unhealthy and restarted.
In order to avoid the constant restart of the pod, this patch adds
a new readiness checks that checks if the resources used by
the enabled handlers are over quota.
Closes-Bug: 1804310
Change-Id: If4d42f866d2d64cae63736f4c206bedca039258b