Stop using environment TAG_VER when tagging kube-conformance images,
as they should be tagged with the upstream (fixed) tag, currently
'v1.16' (instead of the validation release tag, e.g. '3.0.0').
JIRA: VAL-105
Change-Id: I1ea7e7395e7a796c7eb22fcdad41ba92c8d555ac Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>