SmallWorldConnector does not work the source/target is split.

[Christian-B]

See #1309

It check the weights are as expected.

They then check the first spike wave moves from the position 0,0 in waves until it reaches 5,5
0,0 spikes at time = 4
0,1, 1,0 and 1,1 all spike at time = 11
0,2 1,2 2,0 2,1 and 2,2 all spike at 17 (or 18 as 2,2 only gets one spike)
0,3 ect at around 23
Then 0,4 at around 29

However if split into 2,2 grids the weights are correct
spike waves are a MESS
I added a log to see when the cores thing they spikes and that matches with the reported spikes.
So it is not a local back to raster ids issue

The issue is that the cores are numbered by Slice.lo_atom to slice.hi_atom and not by raster ids.