[lworld] RFR: 8294678: [lworld] Update AccessFlags tests to include ACC_IDENTITY and ACC_VALUE

[Roger Riggs]

The tests for Class.accessFlags should be updated to check ACC_IDENTITY and ACC_VALUE. 
Update ClassAccessFlagTest and ObjectMethods test to check consistency between
Class.isIdentity() and Class.isValue() methods with the Class accessFlags().

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Commit messages:
 - 8294678: [lworld] Update AccessFlags tests to include ACC_IDENTITY and ACC_VALUE

Changes: https://git.openjdk.org/valhalla/pull/775/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=775&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294678
  Stats: 48 lines in 3 files changed: 30 ins; 0 del; 18 mod
  Patch: https://git.openjdk.org/valhalla/pull/775.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/775/head:pull/775

PR: https://git.openjdk.org/valhalla/pull/775