Add a note about the 500->404 not requiring a microversion
Add a note about the 500->404 not requiring a microversion

404 error code is always one of the return code when url or
resource does not exist, so 404 is an available status code for all the
Nova API. Then no microversion bump required for fixing 500 to 404
.

Change-Id: I4b1703e82cd89192b2ba4ce2603741e33dd26586

sebrandon1/nova,cyx1231st/nova,mahak/nova,klmitch/nova,zhimin711/nova,Juniper/nova,jianghuaw/nova,Juniper/nova,dims/nova,devendermishrajio/nova,sebrandon1/nova,rahulunair/nova,BeyondTheClouds/nova,mahak/nova,alaski/nova,cloudbase/nova,dims/nova,rahulunair/nova,hanlind/nova,fnordahl/nova,alaski/nova,BeyondTheClouds/nova,gooddata/openstack-nova,openstack/nova,bigswitch/nova,mikalstill/nova,CEG-FYP-OpenStack/scheduler,phenoxim/nova,gooddata/openstack-nova,hanlind/nova,CEG-FYP-OpenStack/scheduler,sebrandon1/nova,mahak/nova,vmturbo/nova,bigswitch/nova,rajalokan/nova,mikalstill/nova,cernops/nova,Juniper/nova,devendermishrajio/nova,jianghuaw/nova,raildo/nova,cloudbase/nova,hanlind/nova,BeyondTheClouds/nova,gooddata/openstack-nova,mikalstill/nova,fnordahl/nova,cloudbase/nova,apporc/nova,openstack/nova,rajalokan/nova,cernops/nova,raildo/nova,NeCTAR-RC/nova,rahulunair/nova,NeCTAR-RC/nova,cernops/nova,rajalokan/nova,apporc/nova,phenoxim/nova,klmitch/nova,klmitch/nova,openstack/nova,cyx1231st/nova,vmturbo/nova,jianghuaw/nova,gooddata/openstack-nova,jianghuaw/nova,vmturbo/nova,zhimin711/nova,Juniper/nova,klmitch/nova,rajalokan/nova,vmturbo/nova