'progress (internal)' advances the state of future

[Nenad Vukicevic]

The following code

  future<intrank_t> fut = rpc(nebr, []() { return myrank; });
  while (!fut.ready())
    progress (progress_level::internal);

eventually completes. I understand that it should hang in the loop as progress(user) was never called.

[Former user]

Fixed issue 88. Added our first regression test. Changed test/nobsrule.py to blacklist tests out of the upcxx-backend instead of the whitelist we had before.

→ <<cset c3e9b00aeda5>>