message: Changing solveTimeInstance method to iterateto match TACSIntegrator API
diff: @@ -935,7 +935,7 @@ class TransientProblem(TACSProblem):
  return
  - def solveTimeInstance(self, timeStep, timeStage=None, Fext=None):
  + def iterate(self, timeStep, timeStage=None, Fext=None):
  """
  Iterate a single time instance in the time integrated transient problem.
  Useful for iterating an aeroelastic problem that is tightly coupled,
  @@ -968,7 +968,7 @@ class TransientProblem(TACSProblem):
  >>> # assume load array comes from an external CFD solver...
  >>> Fext = externalCFDSolver.solve(step, stage)
  >>> # iterate the transient problem in TACS
  - >>> transientProblem.solveTimeInstance(timeStep=step, timeStage=stage, Fext=Fext)
  + >>> transientProblem.iterate(timeStep=step, timeStage=stage, Fext=Fext)
  >>> # get the necessary structural states for coupling
  >>> time, states, dstates, ddstates = transientProblem.getVariables(timeStep=step, timeStage=stage)
  """
  