USN-6493-2: hibagent update

USN-6493-1 fixed a vulnerability in hibagent. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

On Ubuntu 18.04 LTS and Ubuntu 16.04 LTS, the hibagent package has been
updated to add IMDSv2 support, as IMDSv1 uses an insecure protocol and is
no longer recommended.

In addition, on all releases, hibagent has been updated to do nothing if
ODH is configured.

addition advisory imdsv1 imdsv2 insecure lts package protocol releases support ubuntu update usn vulnerability