[FIX] core: enable logger.runbot() when importing odoo as a library

Before this commit, trying to use Odoo as a library without initializing
the logging features would result in a crash because `Logger.runbot()`
is monkey-patched inside the function `init_logger()`, which is de facto
necessary for using Odoo as a lib.

With this commit, we do the monkey-patch at the module-level so whenever
the `netsvc` package is imported the patch is applied, which should be
well before the loading of the registry starts.

closes odoo/odoo#48396

Signed-off-by: Raphael Collet (rco) <rco@openerp.com>

odoo/netsvc.py

@@ -125,14 +125,6 @@ def init_logger():
         return record
     logging.setLogRecordFactory(record_factory)
 
-    logging.RUNBOT = 25
-    logging.addLevelName(logging.RUNBOT, "INFO") # displayed as info in log
-    logging.captureWarnings(True)
-
-    def runbot(self, message, *args, **kws):
-        self.log(logging.RUNBOT, message, *args, **kws)
-    logging.Logger.runbot = runbot
-
     # enable deprecation warnings (disabled by default)
     warnings.filterwarnings('once', category=DeprecationWarning)
     # ignore deprecation warnings from invalid escape (there's a ton and it's
@@ -242,3 +234,11 @@ PSEUDOCONFIG_MAPPER = {
     'error': ['odoo:ERROR', 'werkzeug:ERROR'],
     'critical': ['odoo:CRITICAL', 'werkzeug:CRITICAL'],
 }
+
+logging.RUNBOT = 25
+logging.addLevelName(logging.RUNBOT, "INFO") # displayed as info in log
+logging.captureWarnings(True)
+
+def runbot(self, message, *args, **kws):
+    self.log(logging.RUNBOT, message, *args, **kws)
+logging.Logger.runbot = runbot