Update ServerManager to follow the new expected behavior. The servers
will only be started when one user is active.
If all users are logged out or removed from the system, the servers will
stop.
If the network goes down, the servers will stop and resume once network
has been restored.
Some SMTP tests made use of disabled addresses. We stored addresses
in a map, meaning the order was randomized. This lead to tests sometimes
attempting to authenticate over SMTP using a disabled address, failing.
Add special case handling for draft messages so that if a Draft is
updated via an event it is correctly updated on the IMAP client via a
the new `imap.MessageUpdated event`.
This patch also updates Gluon to the latest version.
We were closing the event QueuedChannel objects in the wrong place;
they should have been closed on test teardown, not on stopBridge
(which was just a test action and wasn't always called).
In order to make the events more scalable, i replace all the
QueuedChannel objects with a single event collector, which would
create QueuedChannels on demand when it receives an event of a new type.
