[Java] Remove split packages in arrow-memory-core and arrow-vectors

[asfimport]

The  java package (org.apache.arrow.util) is provided in two different artifacts

• arrow-memory-core: (Link to GitHub)

• arrow-vectors: (Link to GitHub)
  This is causing trouble when using OSGI dependency management. After converting the maven artifacts to OSGI bundles the package is available via two chains (which is not allowed).

  Additionally, the Java 9+ module system (JPMS) does not allow for split packages either. See here.

  This was mentioned in the mailing list.

  Possible solutions are:

• Renaming the packages to org.apache.arrow.vector.util and org.apache.arrow.memory.util

• Moving the classes from vector to memory-core

Reporter: Benjamin Wilhelm

PRs and other links:

• GitHub Pull Request #8483

_{Note: This issue was originally created as ARROW-10333. Please see the migration documentation for further details.}

[asfimport]

Liya Fan / @liyafan82:
Issue resolved by pull request 8483
#8483