RFR: 8340326: Remove references to Applet in core-libs/security tests [v2]

[Justin Lu]

> Please review this PR which removes usages of Applet within the corelibs tests. This includes both code usage as well as occurrences of the word.
> 
> There were more files found than the ones included in this PR, please see the comment on the JBS issue for the reason why they were not included. In general, I removed the file if the entirety was focused on Applet, otherwise I removed the portions applicable.

Justin Lu 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 three additional commits since the last revision:

 - update TEST.groups with DefaultTimeZoneTest.java removal
 - Merge branch 'master' into JDK-8340326-tests-appletRemoval
 - init

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21096/files
  - new: https://git.openjdk.org/jdk/pull/21096/files/a50c1972..cc860712

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21096&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21096&range=00-01

  Stats: 153402 lines in 749 files changed: 148791 ins; 1873 del; 2738 mod
  Patch: https://git.openjdk.org/jdk/pull/21096.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21096/head:pull/21096

PR: https://git.openjdk.org/jdk/pull/21096