Apollofindrx Test added (#4061)

* first run at apollofindrx tests

* tests updated

* removed old tests

* Update FunctionalTestsApolloFindRx.cpp

* Update apollofindrx.cpp

* Update apollofindrx.h

* changes from comments

* updated tests with bigger cube

* opened window for more cosistant tests and removed a rx point for faster tests

* reverted small cube change

Co-authored-by: Stuart Sides <ssides@usgs.gov>