Update runEddy script to work with new multi-threaded version.

The eddy_cpu command is called twice - once with --nthr=1, and again with --nthr=8

Note that these changes will not work with the openmp eddy build, so do not merge / use this MR until threddy has been released.

eddy/runEddy

@@ -46,10 +46,14 @@ done
 # "eddy_cpu_nthr_X" to the list of
 # executables to run. The name is unpacked
 # in the loop below.
+#
+# We're using 6 threads here for the multi-
+# threaded test, as it is the best option on
+# the FMRIB cluster
 cpu_exes=""
 if [ -x "${exedir}/eddy_cpu" ]; then
   cpu_exes="${cpu_exes} ${exedir}/eddy_cpu_nthr_1"
-  cpu_exes="${cpu_exes} ${exedir}/eddy_cpu_nthr_8"
+  cpu_exes="${cpu_exes} ${exedir}/eddy_cpu_nthr_6"
 fi
 
 if [ "${cuda_exes}" == "" ] && [ "${cpu_exes}" == "" ]; then