RFR: 7903345: Public methods of inner classes are reported as private

[Alexandre Iline]

Removed a bit of code which changes visibility of inner class methods.
Added a test.

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Commit messages:
 - CODETOOLS-7903345: Public methods of inner classes are reported as private

Changes: https://git.openjdk.org/jcov/pull/30/files
 Webrev: https://webrevs.openjdk.org/?repo=jcov&pr=30&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903345
  Stats: 317 lines in 4 files changed: 193 ins; 119 del; 5 mod
  Patch: https://git.openjdk.org/jcov/pull/30.diff
  Fetch: git fetch https://git.openjdk.org/jcov pull/30/head:pull/30

PR: https://git.openjdk.org/jcov/pull/30