add missing imports r=nthomas b=418926

tools/buildbot-configs/automation/production-1.9/master.cfg

@@ -34,8 +34,7 @@ c['sources'] = []
 
 ## configure the Schedulers
 
-from buildbot.scheduler import Scheduler
-from buildbot.scheduler import Dependent
+from buildbot.scheduler import Dependent, Nightly, Scheduler
 from buildbot.changes.pb import PBChangeSource
 
 c['schedulers'] = []
@@ -89,7 +88,7 @@ automation_tag = "RELEASE_AUTOMATION_M7_2"
 c['builders'] = []
 
 from buildbot.process import factory
-from buildbot.steps.shell import ShellCommand
+from buildbot.steps.shell import ShellCommand, Compile, Configure
 from buildbot.steps.transfer import FileDownload
 
 from buildbot import locks