Avoid race conditions in processing calls

Methods called on Asterisk calls are always dispatched through the translator. Those which call back to the translator should do so within the task rather than exposing race conditions (and performance impact) of calling back through the translator actor proxy.

CHANGELOG.md

@@ -1,4 +1,5 @@
 # [develop](https://github.com/adhearsion/punchblock)
+  * Bugfix: Avoid race conditions in processing calls with interactions between them
 
 # [v2.7.3](https://github.com/adhearsion/punchblock/compare/v2.7.2...v2.7.3) - [2015-08-18](https://rubygems.org/gems/punchblock/versions/2.7.3)
   * Bugfix: Handle correct event for confirming that a component stop was completed on Asterisk 13

lib/punchblock/translator/asterisk.rb

@@ -151,7 +151,7 @@ def execute_global_command(command)
           if call = call_with_id(command.uri)
             command.response = ProtocolError.new.setup(:conflict, 'Call ID already in use')
           else
-            call = Call.new command.to, current_actor, ami_client, connection, nil, command.uri
+            call = Call.new command.to, self, ami_client, connection, nil, command.uri
             register_call call
             call.dial command
           end
@@ -231,7 +231,7 @@ def handle_async_agi_start_event(event)
 
         return if env[:agi_extension] == 'h' || env[:agi_type] == 'Kill'
 
-        call = Call.new event['Channel'], current_actor, ami_client, connection, env
+        call = Call.new event['Channel'], self, ami_client, connection, env
         register_call call
         call.send_offer
       end