Hi again!
Starting from your initial problem (bundle not starting with a missing
requierement),
you should have typed in your Karaf console: 'feature:list' and see all the
camel features (with no one named camel-osgi with the 2.12 version, but
some other starting with camel-*).
In doubt, you would have tried installing the base camel feature
('feature:install camel').
Then looked at the camel bundles installed: 'la | grep *camel*'
Then, looked at the Symbolic-Name header of this bundle: 'bundle:headers
<ACamelBundle> | grep Bundle-SymbolicName'.
Seeing this, you would have changed your manifest entry to camel.core,
camel.blueprint, then installing the additionnal features you wanted ;).
Regards,