LabHub: Use activate instead of init

__init__ is executed at load time and
and any issue in the plugin will lead
to it not showing up.
LifeCycle: __init__->configured->enable

Closes #554

plugins/labhub.py

@@ -20,9 +20,7 @@ class LabHub(BotPlugin):
     GH_ORG_NAME = constants.GH_ORG_NAME
     GL_ORG_NAME = constants.GL_ORG_NAME
 
-    def __init__(self, bot, name=None):
-        super().__init__(bot, name)
-
+    def activate(self):
         teams = dict()
         try:
             gh = github3.login(token=os.environ.get('GH_TOKEN'))
@@ -62,6 +60,7 @@ def __init__(self, bot, name=None):
             self.REPOS.update(self.gl_repos)
 
         self.hello_world_users = set()
+        super().activate()
 
     @property
     def TEAMS(self):

tests/labhub_test.py

@@ -114,10 +114,11 @@ def test_hello_world_callback(self):
             'coala developers': self.mock_team,
             'coala maintainers': self.mock_team,
         }
-
-        testbot = TestBot(extra_plugin_dir='plugins', loglevel=logging.ERROR)
-        testbot.start()
-        labhub = testbot.bot.plugin_manager.get_plugin_obj_by_name('LabHub')
+        labhub, testbot = plugin_testbot(plugins.labhub.LabHub, logging.ERROR)
+        labhub.activate()
+        #testbot = TestBot(extra_plugin_dir='plugins', loglevel=logging.ERROR)
+        #testbot.start()
+        #labhub = testbot.bot.plugin_manager.get_plugin_obj_by_name('LabHub')
         labhub.TEAMS = teams
         self.mock_team.is_member.return_value = False
         testbot.assertCommand('hello, world', 'newcomer')
@@ -235,7 +236,7 @@ def test_assign_cmd(self):
 
         testbot.assertCommand(cmd.format('coala', 'a', '23'),
                               'You\'ve been assigned to the issue')
-        
+
         # no assignee, newcomer, initiatives/gci
         mock_maint_team.is_member.return_value = False
         mock_dev_team.is_member.return_value = False