[FSTORE-1008] enable interacting with java client to hopsworks

[davitbzh]

This PR adds/fixes/changes...

• please summarize your changes to the code
• and make sure to include all changes to user-facing APIs

JIRA Issue: -

Priority for Review: -

Related PRs: -

How Has This Been Tested?

• [ ] Unit Tests
• [ ] Integration Tests
• [ ] Manual Tests on VM

Checklist For The Assigned Reviewer:

- [ ] Checked if merge conflicts with master exist
- [ ] Checked if stylechecks for Java and Python pass
- [ ] Checked if all docstrings were added and/or updated appropriately
- [ ] Ran spellcheck on docstring
- [ ] Checked if guides & concepts need to be updated
- [ ] Checked if naming conventions for parameters and variables were followed
- [ ] Checked if private methods are properly declared and used
- [ ] Checked if hard-to-understand areas of code are commented
- [ ] Checked if tests are effective
- [ ] Built and deployed changes on dev VM and tested manually
- [x] (Checked if all type annotations were added and/or updated appropriately)

[kennethmhc]

When I was testing it, I found a bug. Can you change line 215 in VectorServer to

      String zippedTupleString =
          zipArraysToTupleString(preparedStatementParameters.get(fgId)
                  .entrySet()
                  .stream()
                  .sorted(Comparator.comparingInt(Map.Entry::getValue))
                  .map(e -> entry.get(e.getKey()))
              .collect(Collectors.toList()));

Basically, the problem is that when there are multiple primary key, they need to be sorted according to the index of preparedStatementParameters