RFR: JDK-8296913: Correct enable preview idiom in JdbLastErrorTest.java [v4]

[Joe Darcy]

> Update the compile command in JdbLastErrorTest.java so that it doesn't need to be modified with each new JDK release to keep using preview features.

Joe Darcy has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge branch 'master' into JDK-8296913
 - Update.
 - Respond to review feedback.
 - JDK-8296913: Correct enable preview idiom in JdbLastErrorTest.java

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/11139/files
  - new: https://git.openjdk.org/jdk/pull/11139/files/7a8d00b4..86f11dc2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11139&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11139&range=02-03

  Stats: 2463 lines in 52 files changed: 1414 ins; 678 del; 371 mod
  Patch: https://git.openjdk.org/jdk/pull/11139.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11139/head:pull/11139

PR: https://git.openjdk.org/jdk/pull/11139