Introduce STOPPING_MAXITER_GLOBAL for Global Optimizers

[spline2hg]

Description

Currently, the default value of STOPPING_MAXITER is set to 1,000,000, which is impractical for global optimizers like Bayesian Optimization.

Proposed Solution (after discussion with Tim)

• Introduce a new parameter STOPPING_MAXITER_GLOBAL with a default value of 1,000 for global optimizers.
• Make an exception for Bayesian Optimization to use its package default of 25 iterations for n_iter, or even 100 iterations (closer to STOPPING_MAXITER_GLOBAL).
  (Open to suggestions on how best to handle this.)

Context

• Bayesian Optimization with n_iter=1000 takes ~1 hour for a simple sphere problem.

Related Issue

#630

[janosg]

Sure, you can go ahead with this!

[spline2hg]

closing this issue , ref discussion. thanks!