toolchanger test: oops, forgot to wait for status buffer to update

Changes can take a while to percolate through the IO and Status buffers,
unlike changes to HAL pins which are instant.

Author: SebKuzminsky

tests/toolchanger/reload-tool/non-random/test-ui.py

@@ -93,6 +93,7 @@ def wait_for_hal_pin(name, value, timeout=10):
 assert(h['tool-prep-number'] == 2)
 assert(h['tool-prep-pocket'] == 46)
 
+time.sleep(stat_poll_wait)
 s.poll()
 assert(s.tool_in_spindle == 0)
 assert(s.pocket_prepped == -1)