RFR: JDK-8252870: Finalize (remove "incubator" from) jpackage [v2]

[Andy Herrick]

> JDK-8252870: Finalize (remove "incubator" from) jpackage

Andy Herrick has updated the pull request incrementally with one additional commit since the last revision:

  JDK-8252870: Finalize (remove "incubator" from) jpackage
    - reverting two auto-generated files, and changing module-info to "@since 16"

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/633/files
  - new: https://git.openjdk.java.net/jdk/pull/633/files/4b95b41c..4b1e6363

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=633&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=633&range=00-01

  Stats: 64 lines in 4 files changed: 31 ins; 31 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/633.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/633/head:pull/633

PR: https://git.openjdk.java.net/jdk/pull/633