fixup! test: add tests for SCCNonlinearProblem codegen

Author: AayushSabharwal

test/scc_nonlinear_problem.jl

@@ -1,5 +1,6 @@
 using ModelingToolkit
 using NonlinearSolve, SCCNonlinearSolve
+using OrdinaryDiffEq
 using SciMLBase, Symbolics
 using LinearAlgebra, Test
 
@@ -62,7 +63,7 @@ end
     tspan = (0.0, 1.0)
     mass_matrix = [1.0 0.0 0.0 0.0 0.0; 0.0 1.0 0.0 0.0 0.0; 0.0 0.0 1.0 0.0 0.0;
                    0.0 0.0 0.0 0.0 0.0; 0.0 0.0 0.0 0.0 0.0]
-
+    dt = 1e-3
     function nlf(u1, (u0, p))
         resid = Any[0 for _ in u0]
         f!(resid, u1, p, 0.0)