Remove stop method from reporters, sources, triggers

It still remains in the drivers that the connections utilize.

Change-Id: Ie6efb57af297fbd546eed3e1104299b2e1a5205e

zuul/reporter/__init__.py

@@ -33,9 +33,6 @@ class BaseReporter(object):
     def setAction(self, action):
         self._action = action
 
-    def stop(self):
-        """Stop the reporter."""
-
     @abc.abstractmethod
     def report(self, source, pipeline, item):
         """Send the compiled report message."""

zuul/scheduler.py

@@ -238,7 +238,6 @@ class Scheduler(threading.Thread):
 
     def stop(self):
         self._stopped = True
-        self._unloadDrivers()
         self.stopConnections()
         self.wake_event.set()
 
@@ -285,16 +284,6 @@ class Scheduler(threading.Thread):
         for connection_name, connection in self.connections.items():
             connection.onStop()
 
-    def _unloadDrivers(self):
-        for trigger in self.triggers.values():
-            trigger.stop()
-        for tenant in self.abide.tenants.values():
-            for pipeline in tenant.layout.pipelines.values():
-                pipeline.source.stop()
-                for action in self._reporter_actions.values():
-                    for reporter in pipeline.__getattribute__(action):
-                        reporter.stop()
-
     def _getDriver(self, dtype, connection_name, driver_config={}):
         # Instantiate a driver such as a trigger, source or reporter
         # TODO(jhesketh): Make this list dynamic or use entrypoints etc.
@@ -801,7 +790,6 @@ class Scheduler(threading.Thread):
         self.config = event.config
         try:
             self.log.debug("Performing reconfiguration")
-            self._unloadDrivers()
             abide = self._parseAbide(
                 self.config.get('zuul', 'tenant_config'), self.connections)
             for tenant in abide.tenants.values():

zuul/source/__init__.py

@@ -33,9 +33,6 @@ class BaseSource(object):
         self.connection = connection
         self.projects = {}
 
-    def stop(self):
-        """Stop the source."""
-
     @abc.abstractmethod
     def getRefSha(self, project, ref):
         """Return a sha for a given project ref."""

zuul/trigger/__init__.py

@@ -28,9 +28,6 @@ class BaseTrigger(object):
         self.sched = sched
         self.connection = connection
 
-    def stop(self):
-        """Stop the trigger."""
-
     @abc.abstractmethod
     def getEventFilters(self, trigger_conf):
         """Return a list of EventFilter's for the scheduler to match against.