Switch a few of the buildman methods to coroutines in order to support network calls in methods. Add a test for the ephemeral build manager.

buildman/manager/enterprise.py

@@ -5,7 +5,7 @@ from buildman.component.basecomponent import BaseComponent
 from buildman.component.buildcomponent import BuildComponent
 from buildman.manager.basemanager import BaseManager
 
-from trollius.coroutines import From
+from trollius.coroutines import From, Return, coroutine
 
 REGISTRATION_REALM = 'registration'
 logger = logging.getLogger(__name__)
@@ -50,14 +50,15 @@ class EnterpriseManager(BaseManager):
     self.register_component(realm, BuildComponent, token="")
     return realm
 
+  @coroutine
   def schedule(self, build_job, loop):
     """ Schedules a build for an Enterprise Registry. """
     if self.shutting_down or not self.ready_components:
-      return False
+      raise Return(False)
 
     component = self.ready_components.pop()
     loop.call_soon(component.start_build, build_job)
-    return True
+    raise Return(True)
 
   def build_component_ready(self, build_component, loop):
     self.ready_components.add(build_component)
@@ -65,6 +66,7 @@ class EnterpriseManager(BaseManager):
   def shutdown(self):
     self.shutting_down = True
 
+  @coroutine
   def job_completed(self, build_job, job_status, build_component):
     self.job_complete_callback(build_job, job_status)