Improve fence_* -o metadata output for schema generation
This patch helps allow applications which rely on resource-agent
metadata to parse the output of fence_X -o metadata.
The <resource-agent> tag may not be needed, but is useful for assisting
in schema generation. We can use <fence-agent> if this works better for
you, but the name (e.g. fence_ilo) is needed for the schema, so the
metadata output should include it.