Missing module name in the plugin discovery path

Thanks @tunic, I start working in this issue.

The routes of the plugins files have been changed properly.
After update the code it is needed to clear the caches to regenerate the cache with the new roots.
Ready for testing.

Reviewed and looks good to me.

Can be moved to RTBC.

Works ok, I've created a dummy report in other module and it is located and displayed o the Xray interface.