RFR: 8253397: Ensure LogTag types are sorted

[Claes Redestad]

- Sort LogTag type enum alphabetically
- Assert that the tags are sorted instead of sorting

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Commit messages:
 - Ensure LogTag types are sorted

Changes: https://git.openjdk.java.net/jdk/pull/274/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=274&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253397
  Stats: 58 lines in 2 files changed: 24 ins; 22 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk/pull/274.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/274/head:pull/274

PR: https://git.openjdk.java.net/jdk/pull/274