Complet Method Verification of limits
Complet Method Verification of limits

This complete the Method Verification of limits,
as this is the only method supported.
http://paste.openstack.org/show/495202/
has the method call and return sample value.

also, clean and correct some error return code.

Part of bp:api-ref-in-rst

Change-Id: Ic1dca126d1acef3eaa8a56ef764f3ddefcb28ba4

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