Remove incorrect comments in multiple_create
Remove incorrect comments in multiple_create

nova.api.extensions.server.extensions doesn't exist
and we don't use extensions now

Change-Id: Icb0e8c521577d23ba949ef5598fc5d1e9fa23fd5

Juniper/nova,jianghuaw/nova,klmitch/nova,Juniper/nova,mahak/nova,openstack/nova,Juniper/nova,rahulunair/nova,mikalstill/nova,gooddata/openstack-nova,vmturbo/nova,mahak/nova,jianghuaw/nova,Juniper/nova,gooddata/openstack-nova,jianghuaw/nova,klmitch/nova,vmturbo/nova,vmturbo/nova,phenoxim/nova,openstack/nova,jianghuaw/nova,mikalstill/nova,mikalstill/nova,rahulunair/nova,vmturbo/nova,phenoxim/nova,mahak/nova,klmitch/nova,klmitch/nova,gooddata/openstack-nova,gooddata/openstack-nova,rahulunair/nova,openstack/nova