Fix issue creating SMuRF controller client list for single controllers #155
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This adds a check for if we've just got a single controller instance back from
_find_active_instances()
, which was resulting in the error described in #153._find_active_instances()
returns a single string when it only finds one of a given Agent type online, otherwise it returns a list. We were handling the instance of two or more SMuRFs and zero SMuRFs, but not one. This fixes that.I added a whole new mock client setup to test this. There might be some way to simplify this, but I'm not too concerned at the moment. If we need to add a third mock client setup we should figure that out.
Resolves #153.