Try to unlock the global lock in StructuredLogger after reloading logging

This should finally fix all the websockets related failures we've been
seeing lately.

tests/wpt/metadata/MANIFEST.json

@@ -650026,7 +650026,7 @@
    "support"
   ],
   "tools/serve/serve.py": [
-   "31a08dbd016752db5925410dbf5435a0e8623981",
+   "104701caf85ba2250d4c844650025517f0d473b6",
    "support"
   ],
   "tools/serve/test_functional.py": [

tests/wpt/web-platform-tests/tools/serve/serve.py

@@ -19,8 +19,10 @@ from collections import defaultdict, OrderedDict
 from multiprocessing import Process, Event
 
 from localpaths import repo_root
+from six.moves import reload_module
 
 from manifest.sourcefile import read_script_metadata, js_meta_re, parse_variants
+from mozlog.structuredlog import StructuredLogger
 from wptserve import server as wptserve, handlers
 from wptserve import stash
 from wptserve import config
@@ -631,9 +633,10 @@ class WebSocketDaemon(object):
 def start_ws_server(host, port, paths, routes, bind_address, config, **kwargs):
     # Ensure that when we start this in a new process we have the global lock
     # in the logging module unlocked
+    reload_module(logging)
     try:
-        logging._releaseLock()
-    except RuntimeError:
+        StructuredLogger._lock.release()
+    except threading.ThreadError:
         pass
     return WebSocketDaemon(host,
                            str(port),
@@ -647,9 +650,10 @@ def start_ws_server(host, port, paths, routes, bind_address, config, **kwargs):
 def start_wss_server(host, port, paths, routes, bind_address, config, **kwargs):
     # Ensure that when we start this in a new process we have the global lock
     # in the logging module unlocked
+    reload_module(logging)
     try:
-        logging._releaseLock()
-    except RuntimeError:
+        StructuredLogger._lock.release()
+    except threading.ThreadError:
         pass
     return WebSocketDaemon(host,
                            str(port),