Run periodics in sahara-engine instead of sahara-api

Periodics should run in engine, not in api, because they don't
interact with the user. On the other hand they do require remote
operations.

Change-Id: I00273de0632ee99ca21e9ddd796755172af2a4da

sahara/cli/sahara_all.py

@@ -52,7 +52,7 @@ def main():
 
     app = server.make_app()
 
-    server.setup_sahara_api(app, 'all-in-one')
+    server.setup_sahara_api('all-in-one')
     server.setup_sahara_engine()
 
     wsgi.server(eventlet.listen((cfg.CONF.host, cfg.CONF.port), backlog=500),

sahara/cli/sahara_api.py

@@ -52,7 +52,7 @@ def main():
 
     app = server.make_app()
 
-    server.setup_sahara_api(app, 'distributed')
+    server.setup_sahara_api('distributed')
 
     wsgi.server(eventlet.listen((cfg.CONF.host, cfg.CONF.port), backlog=500),
                 app, log=logging.WritableLogger(LOG), debug=False)

sahara/main.py

@@ -95,20 +95,16 @@ def setup_common(possible_topdir, service_name):
     plugins_base.setup_plugins()
 
 
-def setup_sahara_api(app, mode):
-    periodic.setup(app)
-
-    #TODO(dmitryme): move periodics to engine, until then the remote
-    # initialization here is a temporal hack
-    remote_driver = _get_remote_driver()
-    remote.setup_remote(remote_driver, None)
-
+def setup_sahara_api(mode):
     ops = _get_ops_driver(mode)
+
     service_api.setup_service_api(ops)
     edp_api.setup_edp_api(ops)
 
 
 def setup_sahara_engine():
+    periodic.setup()
+
     engine = _get_infrastructure_engine()
     service_ops.setup_ops(engine)
 

sahara/service/periodic.py

@@ -102,7 +102,7 @@ class SaharaPeriodicTasks(periodic_task.PeriodicTasks):
         context.set_ctx(None)
 
 
-def setup(app):
+def setup():
     if CONF.periodic_enable:
         if CONF.periodic_fuzzy_delay:
             initial_delay = random.randint(0, CONF.periodic_fuzzy_delay)
@@ -111,9 +111,9 @@ def setup(app):
         else:
             initial_delay = None
 
-        app.tg = threadgroup.ThreadGroup()
+        tg = threadgroup.ThreadGroup()
         pt = SaharaPeriodicTasks()
-        app.tg.add_dynamic_timer(
+        tg.add_dynamic_timer(
             pt.run_periodic_tasks,
             initial_delay=initial_delay,
             periodic_interval_max=CONF.periodic_interval_max,