Consolidate module manifests generation

This patch changes module.py so that it generates both manifests
at once. We do not need to have it split. Doing it in one step
makes we also need to resolve modules once.

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>