RFR: 8244976: vmTestbase/nsk/jdi/Event/request/request001.java doesn' initialize eName

[Leonid Mesnik]

Fixed tests that use eName to print event name to print the class name. Plus some minor refactoring.

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Commit messages:
 - 8244976: vmTestbase/nsk/jdi/Event/request/request001.java doesn' initialize eName

Changes: https://git.openjdk.org/jdk/pull/9624/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9624&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8244976
  Stats: 45 lines in 3 files changed: 10 ins; 20 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/9624.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9624/head:pull/9624

PR: https://git.openjdk.org/jdk/pull/9624