Ensure cf/org/space user lists and counts use the same data

• Currently one global call to fetch all users fetches data for the
  • cf user's tab
  • summary User Org Role : and User Space Role/s : lines
  • cf summary users count
• Separate requests (once per org) are made to fetch users for the
  • org users tab
  • org users count
• Separate requests (once per space) are made to fetch users for the
  • space users tab
  • space users count

Issues/solutions

• If the user is not the admin, the first call will fail. We need to fall back on the other methods to populate any user info
  • cf user's tab - make a call to each org. this should provide all org and space roles
  • summary 'user x role/s' should come from the data provided from the other calls
  • cf summary users count - this should come from a separate call (max results = 1, read total result), otherwise we make a hell of a lot of calls every time we visit the cf summary page
• The other methods should not make additional calls if we already have that data (user is an admin). Suggest having an effect that will take the all users response, massage it and store in a way that the other methods can use.

No files, tests, or entry points are named. First trace the existing user-list and user-count requests for the Cloud Foundry, organization, and space views, then identify where their results can be shared. Done means the tabs, role summaries, and counts use consistent data without unnecessary duplicate requests and still work for non-admin users.