Imply --one-time when --force is used

Without this change, if a user runs os-collect-config --force, it will
lock the user in an infinite loop running the command over and over with
very little chance to cancel. There are no compelling use cases for that
behavior, but it is extremely inconvenient, so implying --one-time
improves usability of os-collect-config for users.

Change-Id: Ia8c9bf0bf97ab9e40e465c947c2f0cbeb981c08e