Fix IterativeSolverBase referring to itself as ConjugateGradient
What does this implement/fix?
Two assertion messages in IterativeSolverBase
refer to it as ConjugateGradient
.
This is incorrect, as the derived class could be several different solvers, not just CG.
This MR changes those assertion messages to say IterativeSolverBase
instead.
This is consistent with another identical assertion further down in the file
that is already saying "IterativeSolverBase is not initialized."
Based on this git history, it looks like IterativeSolverBase was made by extracting
code out of ConjugateGradient
and that these messages were copy-pasted at that
time without being modified. A simple copy-paste error.