packaging: setup: fixing development environment

Fixing imports and external tool usage for
notroot developing environment.

Change-Id: Ifa388eeec683ec2ec4f7e3b3949e296f2078180e
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1109326
Signed-off-by: Simone Tiraboschi <stirabos@redhat.com>
(cherry picked from commit 4a1dbc0343b3d2501dce756df827b5083b78cae1)