Merge commit '06e559779edd93a83100824b36c9bf67a27db178' * commit '06e559779edd93a83100824b36c9bf67a27db178': Fix SipSessionGroup from throwing ConcurrentModificationException
Merge commit '06e559779edd93a83100824b36c9bf67a27db178' * commit '06e559779edd93a83100824b36c9bf67a27db178': Fix SipSessionGroup from throwing ConcurrentModificationException