Description of problem:

From the pulp v2 documentation, it is unclear how to use the API to trigger an update of all packages on a consumer or consumer group.  The goal is to be able to perform the equivalent of a 'yum update' on a single consumer or on all consumers within a consumer group. 

Documentation:

Consumer:
  - http://pulp-dev-guide.readthedocs.org/en/pulp-2.1/integration/rest-api/consumer/content.html#update-content-on-a-consumer

  Note: There is an option for 'all'; however, based on discussion, it seems that the user must still pass in package names.

Consumer Group:
http://pulp-dev-guide.readthedocs.org/en/pulp-2.1/integration/rest-api/index.html

  Note: I don't see any content management docs for consumer groups.

Version-Release number of selected component (if applicable):
pulp-server-2.1.2-0.3.beta.el6.noarch