Update test_integration_pending.rb

Author: fractaledmind

test/test_integration_pending.rb

@@ -127,6 +127,7 @@ def test_busy_handler_timeout_releases_gvl
         work << '.'
       end
     end
+    sleep 1
 
     @db.busy_handler do |count|
       now = Process.clock_gettime(Process::CLOCK_MONOTONIC)