Support --force option for Anchore analysis

It would be useful to be able to include the 'force re-analysis' option in a pipeline job in the case of an analysis failure (for example, due to a misconfiguration).

We plan to use Anchore mostly as a quality gate with Jenkins.  Currently if an analysis failure occurs, the image must be manually unsubscribed, and then deleted before the Jenkins job can be re-run.

Ideally, with the 'force' option, the problem could be fixed and the job re-run without any manual intervention.