revive deploy:all with deprecation warning

tests/unit/ps.bats

@@ -11,7 +11,10 @@ teardown() {
 }
 
 @test "ps" {
-  skip "circleci does not support docker exec at the moment"
+  # CI support: 'Ah. I just spoke with our Docker expert --
+  # looks like docker exec is built to work with docker-under-libcontainer,
+  # but we're using docker-under-lxc. I don't have an estimated time for the fix, sorry
+  skip "circleci does not support docker exec at the moment."
   run bash -c "dokku ps $TEST_APP | grep -q \"node web.js\""
   echo "output: "$output
   echo "status: "$status