Enable Touchstone testing by allowing user to enter a Touchstone User Key

[caspears]

The Touchstone Test Scripts for proxy testing between a client and server (such as in the test identified below) require an org key, user key or an ip address configured in the client setup in touchstone. We want anyone with access to the RI client to be able to run the touchstone test. The problem is that only the owner of the system or admins can add/change IP addresses, disallowing others to run the test.

Instead, it would be nice if the Touchstone client could be set up to accept user keys (which should be done after this issue is resolved) and the client RI could be configured in the app (along with the server URLs) and the user key would be sent in the header for USER_KEY header. The label for the entry of this user key should be clear as this would only apply to touchstone testing (a label like: USER_KEY (for touchstone proxy testing only)

/FHIRSandbox/DaVinci/FHIR4-0-1-PCT/01-AEOB-MRI/01-PCT-MRI-Scenario-GFE-Instit-Request-json