[lworld] RFR: 8287359: ACC_IDENTITY bit not consistently set in Inner class flags

[Srikanth Adayapalam]

Properly align with the spec in setting ACC_IDENTITY bit for inner classes

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Commit messages:
 - More precise identity determination while reading class files.
 - Ensure java.lang.Object is not an identity class
 - 8287359: ACC_IDENTITY bit not consistently set in Inner class flags

Changes: https://git.openjdk.java.net/valhalla/pull/699/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=699&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8287359
  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/699.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/699/head:pull/699

PR: https://git.openjdk.java.net/valhalla/pull/699