RFR: 8298868: Update EngineCloseOnAlert.java for changes to TLS implementation [v2]

[Matthew Donovan]

> Refactored the code a little bit and updated the test for changes to the TLS state machine.

Matthew Donovan has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge branch 'master' into engine-close
 - removed unnecessary line
 - 8298868: Update EngineCloseOnAlert.java for changes to TLS implementation

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Changes: https://git.openjdk.org/jdk/pull/11903/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11903&range=01
  Stats: 56 lines in 2 files changed: 15 ins; 9 del; 32 mod
  Patch: https://git.openjdk.org/jdk/pull/11903.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11903/head:pull/11903

PR: https://git.openjdk.org/jdk/pull/11903