RFR: 8255035: Update BCEL to Version 6.5.0

[Joe Wang]

Update BCEL to the latest version (6.5.0). The majority of the changes were code refactoring (name format changes).

XML tests passed on both Linux and Windows.

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Commit messages:
 - 8255035: Update BCEL to Version 6.5.0

Changes: https://git.openjdk.java.net/jdk/pull/3893/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3893&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8255035
  Stats: 2148 lines in 94 files changed: 98 ins; 33 del; 2017 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3893.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3893/head:pull/3893

PR: https://git.openjdk.java.net/jdk/pull/3893