tornado: Move tornado_ioloop_logging to new zerver/tornado tree.

tools/lint-all

@@ -69,7 +69,7 @@ def check_pyflakes(options, by_lang):
                       " undefined name 'bugdown'" in ln) or
                      ("scripts/lib/pythonrc.py" in ln and
                       " import *' used; unable to detect undefined names" in ln) or
-                     ("zerver/lib/tornado_ioloop_logging.py" in ln and
+                     ("zerver/tornado/ioloop_logging.py" in ln and
                       "redefinition of function 'instrument_tornado_ioloop'" in ln) or
                      ("zephyr_mirror_backend.py:" in ln and
                       "redefinition of unused 'simplejson' from line" in ln)):

zerver/management/commands/runtornado.py

@@ -5,12 +5,12 @@ from typing import Any, Callable
 
 from django.conf import settings
 settings.RUNNING_INSIDE_TORNADO = True
-# We must call zerver.lib.tornado_ioloop_logging.instrument_tornado_ioloop
+# We must call zerver.tornado.ioloop_logging.instrument_tornado_ioloop
 # before we import anything else from our project in order for our
 # Tornado load logging to work; otherwise we might accidentally import
 # zerver.lib.queue (which will instantiate the Tornado ioloop) before
 # this.
-from zerver.lib.tornado_ioloop_logging import instrument_tornado_ioloop
+from zerver.tornado.ioloop_logging import instrument_tornado_ioloop
 instrument_tornado_ioloop()
 
 from django.core.management.base import BaseCommand, CommandError, CommandParser