Fix timeouts on reconfiguration

First commit is just warning fix, most valuable is second one.

Because `workflow.Instance` are executing commands one-by-one, `app` component can not execute `serviceCall` requests from `main` in parallel.

Steps  `build-app` and `deploy-libs` don't depend on each other, so they are started by workflow engine in parallel, but are queued for execution by `app` component, and it is possible for `build-app` to run on `app` component before `deploy-libs`. Because `build-app` can run longer than `deploy-libs`, latter step will time out and fail workflow execution.