RFR: 7358: Rename Agent Plug-in in the JVM Browser

[Marcus Hirt]

See the issue for more information.

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Commit messages:
 - 7358: Rename Agent Plug-in in the JVM Browser

Changes: https://git.openjdk.java.net/jmc/pull/284/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=284&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7358
  Stats: 8 lines in 1 file changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.java.net/jmc/pull/284.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/284/head:pull/284

PR: https://git.openjdk.java.net/jmc/pull/284