Remove dead links
Remove dead links

The sample files referenced do not exist, see links from
https://docs.openstack.org/monasca-api/latest/configuration/sample.html.

Replace with links to git.

Change-Id: Ia13a6a2b1aa79450d66623cc019b4310e055e64c

stackforge/monasca-api,openstack/monasca-api,openstack/monasca-api,stackforge/monasca-api,stackforge/monasca-api,openstack/monasca-api,stackforge/monasca-api