ruby_ami noisy on Stream close.

[Steve Sether]

I'm using ruby_ami as an API for some command line utilities for Asterisk.  It works well, but I've found it's very noisy when the program exits.  Essentially I'm creating a new stream object, sending an action, and getting and parsing the results.  Then the program exits.  Before the program exits I get this on my console:

D, [2017-08-07T11:12:17.874599 #5839] DEBUG -- : Terminating 1 actor...

W, [2017-08-07T11:12:17.875207 #5839]  WARN -- : Terminating task: type=:call, meta={:method_name=>:run}, status=:iowait

I've traced this down to Celluloid being noisy, and can silence this by simply doing:

Celluloid.logger.sev_threshold = Logger::FATAL

So that's OK for now, but it seems like there should be a better way.  I first started looking for a way of better closing the AMI connection to avoid having my resources be managed by something else.  I didn't see that anywhere, so I had to dig into some internals and finally found the Celluloid component and then the logger.

Is there a better way to handle this than simply changing the log level?  I think it's much more useful to shut down the AMI connection on my own (and thus avoid this whole problem), but I didn't see that anywhere in the documentation, or public methods.  If there isn't, I think there should be.