remove dependence on sorting by ID
check that expected note exists instead of assuming order

Since we do not have subsecond resolution on the entry_date of notes we
cannot assume the order in this test is meaningful.
remove need for temp variable (sort of) for counting
also check notes on second object after create
refactor test to use subtests (there is still some interdependence)
sort instrument data instead of assuming order
remove unnecessary check that depends on ID being numeric
fixup! remove unnecessary check that depends on ID being numeric
add Informatics as valid lab