Asynchronous task parallelization

[cnpetra]

Asynchronous task parallelization of (true) objective function using existing schedulers (Python thread, process, and MPI executors) and possibly Tucker's (simplistic) task scheduler.

[thartland]

The work in progress branch hiopbbpy-v0.05-dev aims to address these issues.

[thartland]

hiopbbpy v0.05 dev (here) was rescoped to only cover batched Bayesian optimization routines. hiopbbpy v0.06 (here) aims to address this issue.

[cnpetra]

I think further work has been done in addition to batched BO (such as multi-start and initial sampling) and this issue is resolved, @thartland please confirm

[thartland]

I confirm this issue has been resolved.