ansible-playbooks/ansiblemaster#4 Allow turning off fluentd logging with environment variable

fluentd.py

@@ -57,6 +57,9 @@ class CallbackModule(CallbackBase):
             self.disabled = True
             self._display.warning("The required fluent-logger is not installed. "
                                   "pip install fluent-logger")
+        elif os.getenv('FLUENTD_LOGGING', 'yes') == 'no':
+            self.disabled = True
+            self._display.warning("Logging disabled by environment variable.")
         else:
             logging.basicConfig(level=logging.INFO)
             self.logger = logging.getLogger('fluent.ansible')