Fix smoke-test functions for rollback cases

Fix smoke-test functions for rollback cases

The custom step cannot be added outside of installer, because steps are
initialized when Run() invoked.
(If some step added outside of installer, that step will be executed at
 first, ignoring original steps)
This patch defines a new virtual function creating overridden installer
object which is fail at the end of steps or specific stage.

Requires:
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/app-installers/+/218093

Change-Id: I99de606909e5a673d45545dd05095ee0f4111a51
Signed-off-by: Sangyoon Jang <jeremy.jang@samsung.com>