RFR: 8263555: use driver-mode to run ClassFileInstaller

[Igor Ignatyev]

Hi all,

could you please review this small and trivial clean-up patch that replaces `@run main j.t.l.h.ClassFileInstaller` w/ `@run driver j.t.l.h.ClassFileInstaller`?

from JBS:
> there is no point in running ClassFileInstaller class w/ external flags, so it should be run w/ `@run driver`.  

Thanks,
-- Igor

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Commit messages:
 - 8263555: use driver-mode to run ClassFileInstaller

Changes: https://git.openjdk.java.net/jdk/pull/2989/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2989&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263555
  Stats: 6 lines in 5 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2989.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2989/head:pull/2989

PR: https://git.openjdk.java.net/jdk/pull/2989