RFR: 8295058: test/langtools/tools/javac 116 tests classes use com.sun.tools.classfile library [v3]

[Qing Xiao]

> Modified 12 of 226 test/langtools/tools/javac test classes to replace com.sun.tools.classfile library.

Qing Xiao has updated the pull request incrementally with one additional commit since the last revision:

  Added testLength method

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14874/files
  - new: https://git.openjdk.org/jdk/pull/14874/files/88d6c9ee..86636785

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14874&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14874&range=01-02

  Stats: 17 lines in 1 file changed: 2 ins; 10 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/14874.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14874/head:pull/14874

PR: https://git.openjdk.org/jdk/pull/14874