Move Process#run callback higher up to make it useful

Author: mitchellh

lib/net/ssh/shell/process.rb

@@ -38,12 +38,13 @@ def run
           manager.channel.on_data(&method(:on_stdout))
           @master_onclose = manager.channel.on_close(&method(:on_close))
 
+          callback.call(self) if callback
+
           cmd = command.dup
           cmd << ";" if cmd !~ /[;&]$/
           cmd << " DONTEVERUSETHIS=$?; echo #{manager.separator} $DONTEVERUSETHIS; echo \"exit $DONTEVERUSETHIS\"|sh"
 
           send_data(cmd + "\n")
-          callback.call(self) if callback
         end
       end