RFR: JDK-8274259: G1: assert(check_alignment(result)) failed: address not aligned: 0x00000008baadbabe after JDK-8270009

[Tongbao Zhang]

After JDK-8270009, the VerifyBeforeGC missed retired tlabs before verify remset

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Commit messages:
 - whitespace error
 - JDK-8274259: G1: assert(check_alignment(result)) failed: address not aligned: 0x00000008baadbabe after JDK-8270009

Changes: https://git.openjdk.java.net/jdk/pull/5672/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5672&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274259
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5672.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5672/head:pull/5672

PR: https://git.openjdk.java.net/jdk/pull/5672