Made a few testbench corrections and added the missing OEB lines from the
user project.  All existing testbench tests are now passing.
diff --git a/verilog/rtl/caravel.v b/verilog/rtl/caravel.v
index 3c711fd..463f127 100644
--- a/verilog/rtl/caravel.v
+++ b/verilog/rtl/caravel.v
@@ -413,7 +413,8 @@
 		.la_oen (la_oen),
 		// IO Pads
 		.io_in (user_io_in),
-    		.io_out(user_io_out)
+    		.io_out(user_io_out),
+    		.io_oeb(user_io_oeb)
 	);
 
 	/*--------------------------------------*/