Revert "Moved the chaps database directory under /home/root."

This reverts commit d083d86bc53dbc180b0a44d9e388bd122e090e24

This commit likely caused <https://uberchromegw.corp.google.com/i/chromeos/builders/lumpy%20canary/builds/2797/steps/UnitTest/logs/stdio> and other failures.

Change-Id: I4f0beafc20c410b7e58c43770c040883ab156f43
Reviewed-on: https://gerrit.chromium.org/gerrit/60869
Reviewed-by: Peter Mayo <petermayo@chromium.org>
Commit-Queue: Elly Jones <ellyjones@chromium.org>
Tested-by: Elly Jones <ellyjones@chromium.org>