ci: Return 0 if the archive logs is not specified

To prevent failure before and consequently container leftover
return 0 instead of 1 from the archive_logs function, when
the log archive wasn't requested.

Signed-off-by: Ales Musil <amusil@redhat.com>
Signed-off-by: Dumitru Ceara <dceara@redhat.com>

.ci/ci.sh

@@ -38,7 +38,7 @@ function container_shell() {
 
 function archive_logs() {
     if [ -z "$archive_logs" ]; then
-        return 1;
+        return 0;
     fi
 
     log_dir=$CONTAINER_WORKSPACE/logs/