Standardize Naming between Algorithms

[dlcole3]

Right now, PlasmoBenders and PlasmoSchwarz using different naming conventions for similar attributes. For instance (PlasmoSchwarz/PlasmoBenders:

• tolerance/tol
• max_iterations/max_iters
• subproblem_optimizer/solver
• iteration/iter
  Also, PlasmoSchwarz uses a Timers mutable struct object while PlasmoBenders includes the timers as attributes under the algorithm. I think I want to standardize PlasmoBenders to what PlasmoSchwarz has.