Fix user adding & deleting during installing and uninstalling process
Fix user adding & deleting during installing and uninstalling process

Verification:
Build cynara and install it on "fresh" image which contains already
installed cynara rush edition.
Cynara service should start during installation without any warnings
nor errors.
run "systemctl status cynara.service" to check if cynara service works.

Change-Id: I1c98165230277b7ae11d5157c2abd9712067f85f

pohly/cynara,Samsung/cynara,Samsung/cynara,pohly/cynara,Samsung/cynara,pohly/cynara