GH-3007: Ensure version specific Jackson classes are shaded

[z-anderson]

Rationale for this change
The current jar contains version specific classes under META-INF/versions/... with unshaded package names. This leads to clashes with jackson and thus classpath duplicates. This is a major problem in many big projects right now (e.g. Spark).

What changes are included in this PR?
Ensure these classes are shaded.

Are these changes tested?
Are there any user-facing changes?
Closes #3007

[gszadovszky]

@z-anderson, could you add a comment here referencing your modification so we won't forget to update the shaded versions if needed?

[gszadovszky]

@z-anderson, I've ment adding a comment in the master pom where jackson.version is specified. This way if someone would upgrade jackson, they won't forget to check the jdk versions inside the jar and potentially add new versions to include in the shading.

[z-anderson]

@gszadovszky Thank you! This is still blocking us. Are you able to release it soon please?

[gszadovszky]

Sorry @z-anderson, I don't have time to guide a release. As @wgtmac suggested at the other PR, it should be discussed on the dev list.

[ted-jenks]

@gszadovszky @wgtmac @Fokko My emails are seemingly not making it through to the dev mailing list. This is really a big problem for us in Spark. Do you know why I am having trouble/does anyone have the bandwidth to help me out?

[wgtmac]

I have seen duplicate emails on the dev list. No worries, I can help with the release and just replied to the email you have sent.