Remove unneeded bounds-checking code
Remove unneeded bounds-checking code

The previous patch added 'min=1' to the ebtables_exec_attempts
configuration option. That will enforce the value of this config option,
so there is no longer a need for this code.

Blueprint centralize-config-options-newton

Change-Id: I9d3099ddb732976f17b2bd9aa7e4823290866f81

klmitch/nova,sebrandon1/nova,Juniper/nova,mahak/nova,alaski/nova,rahulunair/nova,vmturbo/nova,rajalokan/nova,klmitch/nova,jianghuaw/nova,mikalstill/nova,openstack/nova,klmitch/nova,cloudbase/nova,phenoxim/nova,mahak/nova,Juniper/nova,jianghuaw/nova,Juniper/nova,openstack/nova,sebrandon1/nova,vmturbo/nova,hanlind/nova,mikalstill/nova,hanlind/nova,rahulunair/nova,cloudbase/nova,rajalokan/nova,gooddata/openstack-nova,gooddata/openstack-nova,gooddata/openstack-nova,jianghuaw/nova,hanlind/nova,phenoxim/nova,cloudbase/nova,rajalokan/nova,rahulunair/nova,mikalstill/nova,vmturbo/nova,alaski/nova,mahak/nova,sebrandon1/nova,jianghuaw/nova,gooddata/openstack-nova,klmitch/nova,rajalokan/nova,Juniper/nova,vmturbo/nova,openstack/nova