Announce postInstall interceptions even if package was found to be already installed. The usefulness of this is so modules can listen to get information about where a package was installed to, even if the install aborted early due to the package already being found in place. The interceptor may still need to confirm where the package was.
Two two specific scenario we're not announcing postInstall in is
The package foo is already installed at /path/to/foo. Skipping installation. Use --force option to force install.
foo (1.0.0) is already satisfied by /path/to/foo (1.0.0). Skipping installation.