Fixed several bugs in the service invokers.
Added some more debug statements in invokers.
Removed unnecessary next parameter from fhirizeX routines.
Reintroduced some changes from master branch to try to find out why access token is no longer being passed to test stub.
Undid change from last commit and added some different changes from master branch.
Refactored the invokers.  Makes better use of the MongoDB cache and fixes some bugs.
Temporarily exported all invoker methods for debugging purposes.
Reworked some more things to debug why access token is not getting passed through.
Added some debugging to track paths through invokers.
Fixed bug in setting authorization header for test stub.
Fixed bugs in invokers.
Added display subfield to name field in observation_service_invoker.js.
Resolved conflicts.
Resolved conflicts.