Feature 10296

Update dockerfiles to fetch dependencies from Artifactory
.deb and using pip3 -r instead of apt to resolve all upstream
depenencies

Update stage_3 to use URLs for artifactory packages instead
of apt server for installation of packages

Change-Id: I3abb1e1314862f386fb090cb18429f4283b0273d
Signed-off-by: beierlm <mark.beierl@canonical.com>