HADOOP-19913. Upgrade to Jackson 2.18.8

[pjfanning]

Description of PR

HADOOP-19913 - dependency upgrade

How was this patch tested?

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
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[slfan1989]

@pan3793 Could you please help take a look at this PR? Thank you very much!