Upgrade Jackson version to 2.9.9 (fixes CVE-2019-12086)
Upgrade Jackson version to 2.9.9 (fixes CVE-2019-12086)

Signed-off-by: Alexandre Dutra <50c1216251e1ba8b43ad81daf55563293ecf8562@datastax.com>

datastax/java-driver,datastax/java-driver