RFR: 8297693: Fix typos in src/hotspot and test/hotspot files

[Jaikiran Pai]

Can I please get a review for this change which only fixes typos in src/hotspot and test/hotspot files? These changes were originally done by @mernst in PR https://github.com/openjdk/jdk/pull/10029, but given that the other PR touches multiple other files and areas, the progress was stalled.

This PR introduces only hotspot related typo fixes that Michael had proposed in the other PR plus also includes a review suggestion (in one of these files) that was made by Alexey in the other PR.

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Commit messages:
 - address review comment by Alexey Ivanov
 - 8297693: Fix typos in src/hotspot and test/hotspot files

Changes: https://git.openjdk.org/jdk/pull/11386/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11386&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297693
  Stats: 15 lines in 12 files changed: 0 ins; 0 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/11386.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11386/head:pull/11386

PR: https://git.openjdk.org/jdk/pull/11386