Update OLTPBench to Tim's OLTPBench.

[lmwnshn]

See #362.

This issue tracks the current merge plan:

• Create a separate branch B.
  • B = https://github.com/oltpbenchmark/oltpbench/tree/oltpbench_tim
• Finish any nitpicks on Review changes made by timveil-cockroach/oltpbench, possibly merge. #362.
  • I have finished enough nitpicks to be comfortable merging. Future PRs can address more changes; it will be easier to review if we break it up.
• Merge Review changes made by timveil-cockroach/oltpbench, possibly merge. #362 into B.
• Move src/com back to src/main/java/com.
  • This should make the project buildable. Move src/com to src/main/java/com. #367
• Move the data files back.
  • This should make the project runnable. Add data files back. Remove unused files. #368

(space)

• Merge Ziqi's tests with the old tests. The "tests" were actually never run in CI. Taking a little more time to DIY fix.
  • This should make the project tests run successfully.
• Remove dummy files that we added back to reduce diff size. Add data files back. Remove unused files. #368
• Restore HSQLDB Catalog code.
• Test that NoisePage works with OLTPBench manually.

(space)

• Update NoisePage CI to point to B, and invoke new OLTPBench.
• Add CI to exercise similar code path to old Travis.
• Merge B into master.
• Update NoisePage CI to point to master.
• Delete B.

Time targets have shifted due to travel and quarantine. In this room, I can pick between having a monitor or having wifi.

---

Separately, we should

• Contact Tim to ask about maintainer details for POM, Dockerfile, etc. -- Tim is OK as maintainer.

[lmwnshn]

As of 20 Jul, I am trying to figure out a bug with TPCC/OrderStatus in NoisePage that is manifesting with this version of OLTPBench.

Resolved, the DDL got messed up and I didn't notice.

[lmwnshn]

Working on #382