import from right package (#1047)

Author: baggepinnen

test/test_delay_timeresp.jl

@@ -1,4 +1,5 @@
-import DelayDiffEq: MethodOfSteps, Tsit5
+import DelayDiffEq: MethodOfSteps
+import OrdinaryDiffEq: Tsit5
 using SparseArrays
 
 s = tf('s')
@@ -131,4 +132,4 @@ s = tf("s")
 P = 1 / (0.85*s + 1)*exp(-0.14*s)
 res = step(P, 5)
 @test res.t[end] > 4.5
-@test length(res.y) > 30
+@test length(res.y) > 30