In tests, use the package before adding procs.

traktofon · andreasnoack · commit b32e9301994d · 2018-07-20T17:04:45.000+02:00
This fixes (works around?) `localpart` getting dispatched wrongly
on the workers. No idea why.
diff --git a/test/runtests.jl b/test/runtests.jl
@@ -1,4 +1,6 @@
-using Test, Distributed
+using Test
+using Distributed
+using DistributedArrays
 
 # add at least 3 worker processes
 if nworkers() < 3
