(PDB-4364) Update jackson-databind to 2.9.8
(PDB-4364) Update jackson-databind to 2.9.8

Fixes CVE-2018-5968, CVE-2018-19360, CVE-2018-19361, and
CVE-2018-19362.

puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb