CDRIVER-1889 refactor corpus tests, part 3
CDRIVER-1889 refactor corpus tests, part 3

mapr/libbson,ajdavis/libbson,rcsanchez97/libbson,mongodb/libbson,bjori/libbson,mongodb/libbson,ajdavis/libbson,mapr/libbson,bjori/libbson,mapr/libbson,rcsanchez97/libbson,mongodb/libbson,bjori/libbson,ajdavis/libbson,rcsanchez97/libbson