RFR: 8275729: Qualified method names in CodeHeap Analytics

[Evgeny Astigeevich]

This PR changes nmethods names in `METHOD NAMES for CodeHeap` section to be  qualified.
Testing:
- `make test TEST="gtest"`:  Passed
- `make run-test TEST="tier1"`: Passed
- `make run-test TEST="tier2"`: Passed
- `make run-test TEST=`: serviceability/dcmd/compiler/CodeHeapAnalyticsMethodNames.java

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Commit messages:
 - 8275729: Qualified method names in CodeHeap Analytics

Changes: https://git.openjdk.java.net/jdk/pull/6200/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6200&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275729
  Stats: 75 lines in 2 files changed: 75 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6200.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6200/head:pull/6200

PR: https://git.openjdk.java.net/jdk/pull/6200