- checkpoint: refactoring voip app

...c/main/java/org/bigbluebutton/voice/conf/Application.java

...e/src/main/java/org/bigbluebutton/voice/conf/Service.java

...main/java/org/bigbluebutton/voice/conf/sip/CallAgent.java

...in/java/org/bigbluebutton/voice/conf/sip/CallManager.java

...ain/java/org/bigbluebutton/voice/conf/sip/CallStream.java

...a/org/bigbluebutton/voice/conf/sip/CallStreamFactory.java

...va/org/bigbluebutton/voice/conf/sip/ClientConnection.java

...bigbluebutton/voice/conf/sip/ClientConnectionManager.java

...ebutton/voice/conf/sip/ConnectionClientMethodInvoker.java

...rg/bigbluebutton/voice/conf/sip/OptionMethodListener.java

.../java/org/bigbluebutton/voice/conf/sip/ScopeProvider.java

.../main/java/org/bigbluebutton/voice/conf/sip/SdpUtils.java

...java/org/bigbluebutton/voice/conf/sip/SipConnectInfo.java

...c/main/java/org/bigbluebutton/voice/conf/sip/SipPeer.java

...java/org/bigbluebutton/voice/conf/sip/SipPeerManager.java

...java/org/bigbluebutton/voice/conf/sip/SipPeerProfile.java

...rg/bigbluebutton/voice/conf/sip/SipUserAgentListener.java

...org/bigbluebutton/voice/conf/sip/stream/ListenStream.java

...ton/voice/conf/sip/stream/ReceivedRtpPacketProcessor.java

...igbluebutton/voice/conf/sip/stream/RtpStreamReceiver.java