RFR: JDK-8249903: jdk/javadoc/doclet/testSerializedForm/TestSerializedForm.java needs to be updated after 8146022 got closed

[Hannes Wallnöfer]

I don't know why this test was disabled because of JDK-8146022, in fact I wasn't able to understand what JDK-8146022 was all about as I didn't find a commit for it. However, the test runs fine when updated to the current output format, so I guess whatever bug caused it to fail has been fixed in the meantime. I also removed some vestiges of an old test framework nearby that has been commented out from time immemorial.

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Commit messages:
 - JDK-8249903: jdk/javadoc/doclet/testSerializedForm/TestSerializedForm.java needs to be updated after 8146022 got closed

Changes: https://git.openjdk.java.net/jdk/pull/3791/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3791&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8249903
  Stats: 28 lines in 1 file changed: 9 ins; 9 del; 10 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3791.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3791/head:pull/3791

PR: https://git.openjdk.java.net/jdk/pull/3791