core: Upgrade to Jackson 2.12.1
core: Upgrade to Jackson 2.12.1

Bump jackson version to 2.12.1, which is included in EAP 7.4.2

Change-Id: I328ba70d2c8d69d8832624de523241c23b9c6bc4
Signed-off-by: Sandro Bonazzola <fcb014d63786651910af5db2ecc5316c668188ef@redhat.com>
Signed-off-by: Martin Perina <7bf83f5b771f1cc16b652b5fe02fa33310bda7b0@redhat.com>

oVirt/ovirt-engine-extension-aaa-jdbc,oVirt/ovirt-engine-extension-aaa-jdbc