include ca_cert::update in ca_cert::ca

[ghost]

As ca_cert::ca notifies ca_cert::update, it should probably include it.
If not, manifests using ca_cert::ca will have to explicitly include ca_cert::update.

[pcfens]

ca_cert::update is included in the main ca_cert module that should be included anywhere you're also declaring CAs. It also ensures that the right utilities to manage CAs are installed on the managed system.

[ghost]

OK, the error occurred because I did not include ca_cert.
My bad. I should have read the doc more carefully.