[Merge] lp:~tiagosh/telephony-service/fix-1398427 into lp:telephony-service

[Tiago Salem Herrmann]

> Hey, do you think it'd make sense for you to return true/false depending on
> whether you accepted (consumed/reacted to) the event? We could fall back to
> other consumers then.

Yes, good idea. Just changed the code to match your suggestion.
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https://code.launchpad.net/~tiagosh/telephony-service/fix-1398427/+merge/246224
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