RFR: 8285366: Fix typos in serviceability

[Magnus Ihse Bursie]

I ran `codespell` on modules owned by the serviceability team (`java.instrument java.management.rmi java.management jdk.attach jdk.hotspot.agent jdk.internal.jvmstat jdk.jcmd jdk.jconsole jdk.jdi jdk.jdwp.agent jdk.jstatd jdk.management.agent jdk.management`), and accepted those changes where it indeed discovered real typos.


I will update copyright years using a script before pushing (otherwise like every second change would be a copyright update, making reviewing much harder).

The long term goal here is to make tooling support for running `codespell`. The trouble with automating this is of course all false positives. But before even trying to solve that issue, all true positives must be fixed. Hence this PR.

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Commit messages:
 - Pass #2
 - Pass #1

Changes: https://git.openjdk.java.net/jdk/pull/8334/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8334&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285366
  Stats: 203 lines in 137 files changed: 0 ins; 0 del; 203 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8334.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8334/head:pull/8334

PR: https://git.openjdk.java.net/jdk/pull/8334