Add feature to mount volumes from other containers using 'volumes_from' 

The commits are based on changes to resources:

1. Service: Add `volumes_from` attribute. Serializer updated. Migration needed to update database table.
2. Image: Add `volumes_from` attribute. Serializer updated. Migration needed to update database table.
3. Template: Template builder/converters and serializer updated to use the new `volumes_from` attribute.