Use Case - Topcoder User launching Challenge

[rootelement]

Right now if someone knows the v5 Project ID of an active project, and that project has a billing account, they can launch a challenge. We need to:

• Check to see if the jwt user has an active v5 Project ID
• That user has a role on that project (v5 Project.members)
• If the user has no role on the project, throw a 403

[ThomasKranitsas]

PRs:

• user access updates #366
• user access updates legacy-challenge-resource-processor#19
• user access updates resource-processor#11

cc @rootelement