tests/cluster: always wait for system to be seeded before interacting…

… with snapd

Signed-off-by: Simon Deziel <[email protected]>

tests/cluster

@@ -148,12 +148,12 @@ fi
 
 echo "==> Upgrading the cluster"
 for i in $(seq "${SIZE}"); do
+    lxc exec "${PREFIX}-$i" -- snap wait system seed.loaded
     lxc exec "${PREFIX}-$i" -- snap refresh
     # XXX: there should be no refresh ongoing but we've seen races before so let's collect evidences
     lxc exec "${PREFIX}-$i" -- snap changes
     lxc exec "${PREFIX}-$i" -- snap switch lxd --channel="$3"
     if [ "$i" = "${SIZE}" ]; then
-        lxc exec "${PREFIX}-$i" -- snap wait system seed.loaded
         lxc exec "${PREFIX}-$i" -- timeout 10m snap refresh lxd
     fi
 done