Update git submodules

* Update gerritbot from branch 'master'
  - Replace openstack.org git:// URLs with https://
    
    This is a mechanically generated change to replace openstack.org
    git:// URLs with https:// equivalents.
    
    This is in aid of a planned future move of the git hosting
    infrastructure to a self-hosted instance of gitea (https://gitea.io),
    which does not support the git wire protocol at this stage.
    
    This update should result in no functional change.
    
    For more information see the thread at
    
     http://lists.openstack.org/pipermail/openstack-discuss/2019-March/003825.html
    
    Change-Id: I50e662774e52e6f1c82f7129d7e9eb0ab7cf2af6
    
  - Don't autojoin channels
    
    Don't pass the channels list to super in the irc bot class init method
    because this appears to cause autojoining to happen which breaks because
    we have too many channels. Instead let the event driven processing join
    and part channels as needed to make the least recently used channel
    rotation with channel limit work.
    
    Change-Id: I447e75e84526d08fb9ec88eaae9a90f950dc5349
    
  - Identify with SASL
    
    Identify through SASL using the convenient ib3 mixins, and
    get rid of a bunch of special-case code in the process.
    
    This helps when dealing with channels set to require identified
    users, as otherwise channel joins will race NickServ's processing of
    the identify message and some channels will end up not serviced by
    the bot (an alternative would be to delay joining channels until the
    identify success is confirmed, but the implementation for that looks
    like it would be at least as complex).
    
    Change-Id: I1a01eed8102b59818df247a93fbe4bf50148e76a
    Co-Authored-By: Thierry Carrez <thierry@openstack.org>
    Depends-On: https://review.openstack.org/608313

gerritbot

@@ -1 +1 @@
-Subproject commit f32d742effb74d8e5f81673247411189aa7308e2
+Subproject commit 41d73a447068d56195e3d3e1a96da3e39d57b3d5