Enable mutable config in Cyborg

This patch makes sure Cyborg complies with the community
Rocky goal for mutable config.

Part of bp:mutable-config

Change-Id: I6dec0492f59ee45501b1bff73453b1335aafb62b
Signed-off-by: zhipengh <huangzhipeng@huawei.com>

cyborg/cmd/agent.py

@@ -33,5 +33,5 @@ def main():
                                     'AgentManager',
                                     constants.AGENT_TOPIC)
 
-    launcher = service.launch(CONF, mgr)
+    launcher = service.launch(CONF, mgr, restart_method='mutate')
     launcher.wait()

cyborg/cmd/api.py

@@ -32,5 +32,6 @@ def main():
     # Build and start the WSGI app
     launcher = cyborg_service.process_launcher()
     server = cyborg_service.WSGIService('cyborg_api', CONF.api.enable_ssl_api)
-    launcher.launch_service(server, workers=server.workers)
+    launcher.launch_service(server, workers=server.workers,
+                            restart_method='mutate')
     launcher.wait()

cyborg/cmd/conductor.py

@@ -35,5 +35,5 @@ def main():
                                     'ConductorManager',
                                     constants.CONDUCTOR_TOPIC)
 
-    launcher = service.launch(CONF, mgr)
+    launcher = service.launch(CONF, mgr, restart_method='mutate')
     launcher.wait()

cyborg/common/service.py

@@ -89,7 +89,7 @@ def prepare_service(argv=None):
 
 
 def process_launcher():
-    return service.ProcessLauncher(CONF)
+    return service.ProcessLauncher(CONF, restart_method='mutate')
 
 
 class WSGIService(service.ServiceBase):