Does not always report maxiters

[ChrisRackauckas]

The ODE and SDE solvers halt and throw a warning when maxiters is reached. After that, we check:

length(sol)>= .9*maxiters

to see if maxiters is reached, and throw an error. This is very inexact though, since length(sol)<=maxiters since it's only the accepted timesteps, and so if more than 10% of the timesteps were rejected, this will not throw the error. Somehow we need to catch the warning?

[ChrisRackauckas]

This can be fixed by using the retcode part of the solution type.