Brain: avoid retaining dangerous robot/brain references #1496
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It appears that Hubot is accidentally retaining some references to
robot
andbrain
in objects, leading to unserializable circular references. This fixes the issue bya) Ensuring temporary assignment of
robot
to objects is removed, andb) Tucking
robot
inside a getter function inBrain
, instead of assigning it as a variable, like in theUser
object.