Docs: modernise links
Docs: modernise links

replace outdated URLs with canonical ones.

Change-Id: Ief811c7a8772c210bf68683c78c0690e90e43115

klmitch/nova,mahak/nova,mikalstill/nova,rahulunair/nova,mikalstill/nova,mahak/nova,klmitch/nova,mikalstill/nova,rahulunair/nova,openstack/nova,gooddata/openstack-nova,openstack/nova,gooddata/openstack-nova,klmitch/nova,phenoxim/nova,gooddata/openstack-nova,klmitch/nova,openstack/nova,mahak/nova,phenoxim/nova,gooddata/openstack-nova,rahulunair/nova